In the iOS app, I noticed the following:
I was doing a structured workout. In an interval at 95% FTP, I bailed out and reduced resistance to 70%. My understanding is that this means 70% of 95%, so really about 66% FTP.
And in fact, that’s what was showing as my target power. However, the resistance seems to have been set at 70% of FTP. When I dropped resistance another step, to 65%, the two came into agreement. A few minutes later, when I increased back up to 100%, something similar happened: the apparent resistance and actual resistance were both stuck at about 95% of 95%; when I increased to 105% briefly, that “unstuck” the resistance, and when I lowered it to 100% again, everything was OK.