Oh god, that explain the performance issue. Thanks! I will also try the track pad control. Lastly, could it be because I use a stylus to interact with the app? I find it more precise, especially to place wires.

I don't think screen recording would be that useful. I'm using a Samsung Galaxy Tab S7 FE (6 GB of RAM) and I'm trying to follow Ben Eater's 8-bit computer tutorial series. It's starting to lag a bit, and I'm not that far in the series (registers part), but I lowered the frequency and step. I tried all three mode: selection, interaction and scope; and the camera is still not working. I also tried switching between orthographic and perspective view, still nothing. Opening menus is also not fixing the issue. Edit: If it happens again, I will try to record with my phone to show you.

I want to add to this. On all map apps that I can think of, on iOS and Android, one finger is to move and two finger is to rotate/zoom. In Crumb, it's the reverse. So maybe a toggle to switch between both behavior could be great!