When using a physical Bluetooth keyboard (RK-H81), the built-in keyboard hides as needed, but the text is no longer printed. That is, the physical keyboard writes only one symbol, after which you need to click on the text again, after which everything repeats
I have the same problem (Galaxy z Fold6 smartphone, PowerAdd keyboard). The external keyboard works perfectly in other software, but in Obsidian it keeps jumping after a key input. It continues to work, you can press TAB 6 times and then you are back in the text field - and the game starts all over again. Without all internal and external plugins, the error remains.