I'm having the same issue (on Xbox One).
In v1.16 (pre-Caves & Cliffs Part 1 update). I made all the farms (2) in my plains village wheat farms. Had no issues, farmland planted & excess wheat & seeds left on the ground to despawn.
After being forced to upgrade to v1.19.73, my other village (1.16 loaded plains/hillside village) in which I replanted all to carrots, saw farmers able to raise the level of a composter, but they kept stealing the bonemeal I made in their composters. 😑
After v1.91.81 in my main plains village, farmers weren't stealing bonemeal anymore.
But somewhere around v1.19.81-1.19.83, my issue popped up.
Playing survival hard (shouldn't matter) and started going in/out of nearby nether portal.
Farmers now break fully-grown wheat and still leave wheat & seeds to despawn, BUT they aren't replanting. Also their composters are fully empty.
My farmers should only have seeds and/or wheat and/or bread in their inventory. I believe they only compost seeds?
In 1.16 if there was a blackout, I'd lose a few mobs/villagers, then they'd share wheat/bread & spawn baby villagers. With 1.19 I'm not losing villagers, so perhaps every villagers' inventory is full as well?
When player harvests wheat, the wheat is always picked up first (at least for me).
Also what stops a farmer villager from composting all their seeds?
Please refer to attachment in MCPE-170509 for list of current armor enchantments.
Was able to reproduce glitch 3 times.
Seems to occur when switching from first-person camera perspective to third-person perspective.
Attaching 3x 6MB (10 second duration) video files of gameplay.
See attached image.
Normally I approach the far right berry bush (in 3rd person perspective) to use my diamond hoe and often receive damage (never touch the jump button). As I move to the left and harvest I don't receive damage from other berry bushes.
Created a copy of current world (survival hard), but was unable to re-produce the glitch.
Suggest keeping matter as resolved until I see the glitch again, as it is a minor issue.
See attached image (Fire Protection IV x2).
Re-tested with current gear (not raining) and player model flashes red from damage. Only durability of golden helmet goes down drastically. No flames on player model.
Historical test done with diamond armor (Fire Protection IV x2 & Protection IV x2) during clear & rainy weather (took a while to see half a heart of damage).
Trying to test.
Player can compost seeds, wheat & bread.
My current plains village farmer won't pick up bonemeal, seeds or wheat. Only took 10-15 bread before that too wasn't picked up.
Destroyed all job tables (left composters) and boated farmers. New farmer (job switched) was harvesting wheat & planting seeds.
Seems like simple fix is for farmers to compost bread if say inventory greater than 50.