If you enable the OSK in the system settings and open Minecraft, you will notice that OSK shows up each time the Minecraft window is focused, even when there are no input fields.
Steps to reproduce:
In the system settings turn on on-screen keyboard.
Open Minecraft.
Notice that the OSK shows up every time the Minecraft window is focused, even when there are no input fields.
Observed result:
The on-screen keyboard unnecessary shows up each time the Minecraft window is focused
Expected result:
The on-screen keyboard shouldn't show up each time the Minecraft window is focused, instead it should probably only show up when Minecraft input fields are focused. (MC-270651)
Notes:
If you're using linux you will need to switch to xorg before logging in.
The java minecraft window (nearly) always accepts keyboard events (even if you clear all the keybindings it still captures some non-configurable ones like F3), thus a dynamic OSK would appropriately show up when the window is focused.