When writing, my board becomes very laggy and jittery. It happens on my ipad. I have tried it on blank boards or “busy” boards. The problem happens on all boards seemingly for no reason. Then it will stop for a few days, but it always eventually starts happening again. It occurs on the app and on browser. It does not happen on the same boards when I access them on a desktop. i have had much “busier” boards with more writing in the past where this did not happen. Even when boards would crash due to having too much on them, they never did this laggy/jittery stuff.