Epix 2 (11.28) constantly goes into sleep mode

Some days my Epix 2 activates sleep mode non-stop without my intervention. This happens even when I am walking or cycling. So not only when sitting quietly at the computer or on the sofa. However, the Epix 2 still continues to count steps diligently. One might even wonder how one can sleep and exercise at the same time....
It seems almost as if the clock gets out of rhythm and then constantly activates the sleep mode.
Restarting the watch doesn't really help either. On the contrary, after a restart, the watch immediately goes back into sleep mode. At some point, the phenomenon disappears again for a few days and then suddenly reappears...

Since I use the watch (in addition to its main function of displaying the time) mainly for recording steps and workouts, sleep tracking is actually not important to me. But unfortunately, as far as I know, this can not be switched off completely, which would actually be my preference. This misbehavior makes an otherwise great watch pretty worthless.

In the forum I have read that other users are struggling with similar or the same issues. Does anyone know more about this issue and especially whether there is improvement in sight here?