impact of mouse activity on sound

[spybotics]

I want to play an old game running on XP (LEGO spybotics)
So XP64 is configured on VM 7.0.6
guest additions are installed

On 1 PC all is ok
on another PC, sound (and so speech in the game but even jingle at XP log on & off) is "choppy"; but it becomes clear & clean if I move mouse permanently
it looks like an old (2007) & not solved Linux Hosts post "CPU Priority / VM Usage Changing by Mouse Activity"

PC is Acer swift3 i5-8250U CPU @ 1.60GHz 1.80 GHz with 8G RAM 256G SSD Windows 11
I played with VM parameters (audio, memory size) but no improvement
VM logs attached

Any idea ?
thanks