I see this problem is brought up frequently. My Venu does the same using Redmi Note 9. Tech support does not seem to be aware of this problem as their suggestions are useless. Love my Venu. Hate the SW. Garmin - fix the damn problem!!!
Anyone found a fix yet?
BTW, just to add a detail, not only does the Venu randomly go through repeated disconnect/connect cycles, sometimes just using the phone will send it through this cycle. Yes, it makes it almost unusable.
Ira