I am starting to work with PencilKit and have a small sample app set up with Swift. When I draw a line too long it will crash from com.apple.pencilkit.renderer with the following: -[MTLDebugCommandBuffer lockPurgeableObjects]:2103: failed assertion `MTLResource 0x280584a10 (label: (null)), referenced in cmd buffer 0x107019400 (label: Live rendering command buffer) is in volatile or empty purgeable state at commit' I can draw lots of small lines without issue. Doesn't seem to matter what size the canvas is or any other specific attributes I can determine. It's a quick sample so there's really not much going on, and this appears to be coming from pencil kit and metal under the hood. I am using an iPad pro, iOS 15.1 and a pencil2 and using finger to draw with the same crash if it helps.