This night (EU) my game has been updated and I'm having the same problem on my mobile android.
Every while the game freezes for some seconds with no reason, even with all possible video configurations set to minimum (5 chunks, no clouds...).
It's literally unplayable because the hostile mobs are unaffected by this freezing.
I hope this can be solved soon...
After updating to 1.20.32 still freezes the game sometimes and happens less times, also loads the game faster but the black triangle while loading is stil there.
The bad thing is that I've got some FPS drops on certain places, like lush caves, the nether (in a fortress, near a warped forest and basalt deltas). This didn't happen before the 1.20.32 hotfix.
I've been running around the world (cold ocean, savanna, badlands, oak forest, birch forest, plains, mountains) and I didn't experienced this on any other place of those.