Grease Pencil lag with Sidecar/iPad/macOS Catalina

Hey there, since I didn’t find the right time/people at Bcon19 to talk about this I’d like to post it here.

Generally speaking, using Blender with Sidecar works really well: navigation, modelling, sculpting, texture painting is all well and snappy. The only area with severe lag seems to be Grease Pencil.

Is this a known thing? Can it be addressed from within Blender?