When a mob enters a boat on Java Edition, it does not disappear when unloading chunks. For some reason, they disappear on Bedrock Edition.
Expected Result: Mobs sitting in boats don't despawn

You've flagged the report as a duplicate of MCPE-129051, which is listed as "fixed". Rather, the moderator wrote there that this error "works as intended", referring to the 1.16.0 changelog (illustration A) (https://feedback.minecraft.net/hc/en-us/articles/360044928311-Minecraft-Nether- Update-1-16-0-Bedrock-), which describes the new rules for mob despawning. The problem is that right in the list of changes it is indicated that these changes were made to comply with the Java Edition despawn rules (illustration B). In this case, this bug cannot be considered fixed, because in Java Edition, mobs sitting in boats do not disappear. In the video “illustration C”, which was recorded on Java Edition 1.19.4, you can see that before the chunks is unloaded, there are 4 creepers in one place, two of which I placed in boats. After unloading the chunks and reloading them, we can see that 2 creepers are left in the boat, and the other 2 are despawned. I really hope for a re-examination of this error and the elimination of the despawn of mobs in boats.