App somehow looses control over trainer

For several days (maybe a week?) TD has been quite unstable, which was extremely rare before. The application seems to lose control over the trainer, without losing connection - it does not record power. Sometimes several times during training. Turning power smoothing off and on helped. Once it froze completely at the end of a three-hour training session - I had to brute force the phone to turn off. Today, 3/4 of the way through training, the app lost connection with the trainer and heart rate sensor. Restarting BT helped, but in some intervals the machine began to overestimate the power, and in others it kept the assumed level. At the very end, the power began to fluctuate unbearably.
Pover saving - off.
No conflicts between BT devices.
No changes have been made to the hardware environment.

Android 11 RKQ1.200826.002
MIUI Gobal 12.5.6
Redmi Note 9Pro

That’s pretty strange. We actually do a lot of testing and have ran into issues like these very rarely and can’t replicate them but it’s actually something we are currently working on trying to see if we can figure out how to replicate

  1. Losing connection and app restart fixes it (rare but happens)
  2. Freezes due to something strange. In your case 3 hours it could randomly run out of memory but we have seen a freeze in shorter workouts, again rare
  3. Over estimate power we have never seen without an external power meter or wrong gearing (too big for smaller power targets for example)

In the past I remember people with Redmi phones having issues but that was like 2 years ago and never heard anything since then.

Hopefully a phone restart resolves your issue and you don’t see anything. If you said it started a week ago.

I can see other than today we had something 2 weeks ago, that basically did nothing. On March 26th we did a fairly big BLE change but that mostly should reduce the chances of issues like you are describing not make it worse.

I’m not sure it is related, but I don’t want to start another topic. I too am having some problems with the app (Android phone). When I switch to another app and go back to TD, it sometimes freezes completely. Only restarting the app works, but I do lose the running training.
I also had my HR freezing. Disconnecting the HR monitor and connecting again solves that problem. But it can take a while before I notice it is frozen…

Sorry to hear.

  1. Restarting app should not lose the current training. You should be able click on continue
  2. We experience freezes sometimes but can’t duplicate it so my developer can see it and fix it. We will see if we can switch apps and duplicate this
  3. HR freezing is something one other user just reported. He said it was showing in connections bu not showing any value for HR. We for sure know some random connection issues are happing in some strange cases…

So #1 and #2 are very much being looked at now. If we can reproduce them repeatedly then they should be easy to fix. Our problem now is just reproducing them.

I will update this as we progress but if you see any patterns let me know. Also give me Phone model and which version of Android if you can.

Galaxy S20 with android version 13

Thanks, we will keep testing and see if we can find this.

I have same phone S20 FE with Android 13. It never freezes but I rarely do anything with it while running TrainerDay. Except for some changes on the target value.

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I recently started to have this behavior as well. Sudden power drops. Sometimes it comes back. Sometime I need to restart … the trainer ! So I’m wondering if the problem is the app, of if my trainer is doing something weird…

So generally it seems most trainers throw exceptions at times it’s just the super mature apps elegantly handle these errors. This is my guess is what is going on. So I would call this the app and not worry about your trainer at this point. We see a few small hard to replicate issues and once we can get those resolved we can look farther.

Hi, I am still having this issue happen to me. I was doing a 1.5 hour ride on Sunday and the app started loosing connection with my Tacx neo 2t trainer every minute or so it the last 15 minutes of my workout. I would basically close the app, restart it, continue and then it would work for a minute or so and then happen again. As you can imagine it was quite annoying having to watch the app constantly for when it would drop out of connection and quickly pause the workout, restart it and try and continue.

That’s bizarre and very irritating, I agree. We recently made some changes to how connections work and we are going to completely re-design the way our connections work soon due to multiple reasons (long explanation). I have not actually seen this issue that you had but people occasionally report lost connection so it could be connected. We will see if we can duplicate this but regardless when we re-write our connections it should change how this works and hopefully make it so this never happens. Sorry about that.

I have a 2T but I am using my spin bike and too lazy / old to spend that much time in the cold on my 2T… I should ask what phone do you have here? Looks like iPhone… which model out of curiosity. I should say it’s possible this is related to your device or some interference or something but it’s so strange I am slightly leading towards something in our app but since you are the only one with this issue it’s hard to say.

I also use a Tacx Neo 2T. I use a Wahoo Elemnt Roam to record the training session. If the Wahoo is up and running before TrainerDay then I find that the trainer connects to the Wahoo for control. This was also the case when I used Tacx’s workout app. As long as TrainerDay has started I can switch my Wahoo on and it all works fine. The only time I have had a problem with TrainerDay losing control mid-workout was when I had TrainerDay running in the background. This was with a fairly low-end Android phone (A05S). Just thought I would share in case it helped or helped to replicate the issue.

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I encountered this issue for the first time today. App version 5.2.2, iOS 18.4, erg mode, Wahoo Kickr Core, Power Match on with dual-sided crank arm power meter. Been using the app since September 2023 without a problem.

Maybe six or eight times in an hour long workout power would rapidly ramp down and then stabilize ~25% below the setpoint (225–>160ish). Each time I was able to immediately kick the app back into control by increasing erg % up and then down or by toggling into slope mode then back into erg mode.

What my guess is happened is for some reason trainers throw errors at times. I would guess your workout had ramps in it? Please, send a link to the workout you did. So when it has ramps we send an update very 1 second and some trainers don’t like this and will throw errors (silent to you) but then it might not get a target change.

No ramps.

67e75f4d8b1a7b6ca289c580.tcx (2.7 MB)

Strange. Any Garmin or Wahoo device near by that could have connected to your Trainer? Or possibly a different app that was in the background?