Persistent problem when using Xbox One controller (Connected both via bluetooth and USB connections) and keyboard and mouse. If using Xbox controller play seems fine for an hour+, problems seem to occur after using KBM control, switching back sometimes does not happen, but seems to be inconsistent as to when it decides to not respond. Controller still works in other apps (Xbox button brings up Gamebar, I can play other games, etc). 

After closing Minecraft app and reopening it works fine again (Need to close app, not just world/realm). 

This is using Minecraft in windowed mode, not fullscreen (Can test in FS if desired).