When holding movement keys (W,A,S,D) before the inventory is fully closed, the game ignores the pressed key until you release it again. This is annoying because you need to wait about half a second after exiting your inventory/chest/etc. before you can start moving unlike in Java, where you can start moving instantly
Thank you for your report!
We're tracking this issue as MCPE-25778, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Won't Fix, which means this is considered a bug but won't be fixed. The description of that ticket or the comments might explain the rationale. 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