@tkshnwesper This is related to an unresolved bug that occurs (to my knowledge) when the viewport is zoomed or on Macs with Retina display. See the bugreport #711. Try to replace these lines in src/canvas-layer.js with this._drawAll()
Hi there, I'm having the same problem than @tkshnwesper when using viewport.scale with decimal numbers. Isn't the this._drawAll() performance performance harmful?