I also noticed this. The mouse is especially bad on PAL/non-accelerated setups. Moving the physical mouse quickly will not move the mouse pointer at all, and in addition it blocks all other keyboard input.
I tested this with the imported WHDload version of "Pool of Darkness". The mouse works fine on the system (e.g. after pressing F12 for the menu).
You should be able to reproduce it with the game "Movem", too. Wait until the CLI window appears, move the mouse quickly until the mouse pointer freezes and then press space. The cursor will not move. After stopping the mouse the shell starts to react to key presses again.
Hi,
I added the game Movem (ADF) and ran it with an Kickstart 1.3 Amiga 500 configuration straight from the menu. I did what you wrote above, but everything worked well here.
Also tried Pool of Darkness (WHDLoad version) and had no issues with the mouse.
Using firmware 46.2.1098 on A1200NG (uses same main hardware as A600GS).