When working on multiple devices simultaneously, changes don't appear on the other device.
I log in on both my iPad and MacBook simultaneously. What I draw on the Mac doesn't appear on the iPad, and vice versa.
It used to work, but recently it hasn't worked at all.
I'd like this bug fixed, as I only use online whiteboards for this feature. I'm even willing to buy the paid version, but only for the ability to use the collaboration mode properly.

Please tell me if there's a solution.