hi Alex. my flux 2 started doing this low power thing (same as groennom) a while ago and I thought I had it fixed by calibrating and moving my music onto a different device. this has been working for a while but I’m not having the same problem again and can’t seem to fix it. it looks to me as though the system is staying in slope mode and not going into erg mode at all. hopefully you can fix it.
regards
Jon