nope, on screen button works just fine. (edit: but if you meant if the hardware key works once there is an onscreen button, no, it doesn’t make a difference in that respect)
It does happen when I’m in the command prompt, which is another indicator that it’s not something on the games end.
I tried a lesser dosbox program for android that hasn’t been updated since 2015, and that works fine with the keys, but is otherwise far less useable.
Tomorrow I’ll try an external usb keyboard and see if that will work. 🙂