Compound mobs have bad collision physics that causes them to suffocate their riders. This is because the mob on the bottom affects all the collision, meaning technically all the mobs on top loose their block collision. They become "not solid" to the world.
This is a parent ticket to MC-183012, MC-160201, and MC-163649. More details can be found in them.
Related issues
Comments
Arisa Bot
migrated
Thank you for your report!
We're tracking this issue in MC-477, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
-- I am a bot. This action was performed automatically! Please report any issues on Discord or Reddit