I found a wall clipping bug involving trapdoors activated by buttons. There should be a few screenshots attached for reference.
I noticed that when a player presses the button on the floor and walks into the activated trapdoor, the player would often clip through the wall. I used iron blocks for the wall, an oak trapdoor, and a wooden button in the screenshots, however; after a bit of experimentation, I found that really any combination of blocks, trapdoors, and buttons seem to work.
Thank you for your report!
However, this issue is Incomplete.
Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.
You are welcome to create a new ticket about your issue with more detailed information.
However, please review the Bug Tracker Guidelines and be sure to search for existing issues before writing a new bug report.
Quick Links:
📓 Bug Tracker Guidelines – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki