I see several Q&A that are 2+ years old saying eventing from a graphics tablet on Chrome & FF are spotty.
Which JS events are reliably triggered when using a graphics tablet?
Appended--SO questions I've reviewed trying to get my answer:
// From 2018: Browser support: PointerEvents not detecting Wacom Tablet
// From 2020: Unexpected event values: Graphic tablet pointer events pointerdown event reporting odd values for width and height, no pressue and incorrect pointer type
// From 2020: Undesired aggregation of events: Drag 'n' drop algorithm