I tried several times to work this issue, and I think there’s a set up that is working for me.
Using an iPad Pro 4th gen with iOS 14.4.1, I used an HDMI cable to an EPSON EX7240 projector and the app did not freeze, and the TT images/animation did not freeze or blink. However, when I set it up to a SONY VPL-PHZ10, it didn’t connect with the projector at all. I used the EPSON set up for over an hour without a problem. However, each time I tried with a VGA cable, within a couple of minutes those issues did occur.
When using an iPad 8th gen 32g, and iOS 14.3, TT worked on both projectors, and with VGA and HDMI.
(All my iPads are wifi only)
I know that “the industry” is moving away from VGA, so maybe this is part of that change?
Anyhow, seemed to work tonight!