Wrist Detection Since One UI 6 Update

[User12345678]

I have a GW4 Classic and ever since the One UI 6 Update my watch will lock itself multiple times a day while wearing it. I've tried clearing the cache, turning off wrist detection and wearing the watch tighter on my wrist. None of these these work for me. I had absolutely no problems with the screen locking like this before the update. The only thing that seem to work sometimes is to either reboot the watch or take if off my wrist for a few seconds then put it back on then re-enter the PIN.

Samsung please fix this major bug you introduced in the One UI 6 update. Before this update I absolutely loved my watch. Now it's pretty much unusable.

[Hake]

I've been experiencing this too on my gw6 classic.

[Oxford]

Go into your Settings on your watch, scroll down to Security and Privacy, and turn off wrist detection.

[User12345678]

I have tried that and it still locks although not as often.  

[derw0mbat]

Same bug for me on my GW4 after the update. In the morning I have to restart the watch as it doesn't seem to detect my wrist and keeps locking up. 

[aventham]

After swiping left to the built-in heart-rate widget (or is it a tile?!) and using that to measure my heart rate, wrist-detection is working again for my notifications, and so is my third-party heart rate "complication".
My guess is that there was some sort of system/trust/security permission missing after the update, that only a built-in app could reinstate.
I did also wipe the cache partition via the recovery mode shortly before trying this; it didn't immediately seem to have helped, but may have been necessary as well.

[User12345678]

I tried what you said with doing using the built in heart rate tile. It measures my heart rate just fine  but my watch will just randomly lock again while on my wrist. Then it doesn't matter how many times I unlock it. It immediately locks again until I take it off my wrist and put it back on. The only thing that seems to work for a little while is a reboot.