It’s a bug that seems as if it affects two things. First of all you aren’t able to use auto jump to jump over a block that has a pressure plate on top. Secondly mobs will jump constantly when tracking a player while on top of a pressure plate
Linked issues
Comments

Thank you for your report!
However, this issue is Invalid.
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets.
However, please review the Bug Tracker Guidelines before creating new reports. Be sure to search for an existing issue as it is likely to have already been reported.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki