Keyboard panning scrolls document?

[Malvoz]

I'm seeing this in e.g. https://maps4html.org/experiments/painting/ (you may have to resize the window).

[Malvoz]

Fun fact: Leaflet had this issue for years without noticing before Maps4HTML came along (issue: Leaflet/Leaflet#6229, fix: Leaflet/Leaflet#6231)