Android: Video not displaying on second screen (7.0.9)

Since the update from 7.0.5 to 7.0.9 it is no longer possible to cast the video from a tablet/phone to a TV via HDMI. Video does not play on the TV when ride is started.

Using the same tablet (One Plus 12GB RAM) connected to 4K Sony TV has stopped working. Now, when I try to open the FulGaz app whilst connected (using same USB 3 to HDMI cable that worked before), I get a blue screen stating. "FulGaz Your ride will appear on this screen" but the blue screen doesn't alter. Then when I press "Let's go" on the tablet FulGaz app, the app quickly closes down - blue screen on TV stays though.

If I don't have the cable connected to the tablet, then FulGaz opens normally as does the rides, but, as soon as I connect the casting cable, all I get is the aforementioned blue screen with the FulGaz message - the tablet image does not cast the FulGaz screen to the TV. If I shutdown the app, however, the home screen of the tablet casts to the TV as does any other app.

The same as above occurs when I use my Samsung S24 mobile phone as the source of the casting (which also worked ok last week in the 7.0.5 app version, but not now with the 7.0.9 version). I can use Zwift and My Whoosh without any problems.