Minecraft wiki entry for Development_versions, associated text: MC-138053 – /gamerule spectatorsGenerateChunks being false prevents chunks from being loaded
MC-143369 – Wandering trader text implies trades refresh
MC-144507 – The legs on cats clip through to the top of the model
MC-145863 – Villagers breed even if there are not enough beds
MC-146429 – Farmer villagers stumble between farming and using their composters
MC-146835 – Illager captain spawned from raids will still give the bad omen effect to its killer, causing raids to never end
MC-147740 – Villagers sometimes don't restock
MC-147851 – Villagers frequently run right into mobs they are trying to avoid
MC-148013 – Farmer villager behavior too lazy / not farming at all
MC-148610 – Hostile mobs spawning on top of trapdoors, glowstone and sea lanterns
MC-149372 – Game crashes when opening a 1.13.2 world
MC-149443 – Iron golems spawn too often
MC-150319 – Crash after using /kill
MC-151079 – An employed villager quickly becomes unemployed and employed when it works, even if its workstation has not been deleted.
MC-151084 – Chunk rendering is slow and random
MC-151144 – Hostile mobs in lazy chunks no longer count towards mob cap, breaking mob switches
MC-151185 – Game crash after breaking villager point of interest
MC-151337 – Mob spawn rate too high
MC-151346 – Crash while F3 menu tries to access tags while /reload-ing
MC-151395 – Farmers create bread only when they pick up at least 3 wheat at once