Select Track button is YELLOW and not responsive

I ask why the "Select Track" button is not responsive, ie. the screen to select tracks or to add a track does not open.

Also, the "Select Track" button is YELLOW for Circuit mode (but stays WHITE for Segment and 4x4 Trail modes).

Connected to the Tablet via USB wires are a VFAN GPS receiver and a OBDLink SX scanner. These are working correctly with the GPS Signal status and OBD Connected status bars both green, and the correct (matches vehicle dashboard) data displays, eg. speed, RPMs, engine coolant temperature, etc.

The app is Version is 4.8.5 running in Android 13 on a Samsung Galaxy Tab S7.

I successfully used this hardware/software setup a year ago at Sonoma Raceway (Northern California), and also around my home in Southern California without issues.

UPDATE:
I believe I found/resolved the issue. I was supported by Steve via the HP Tuners chat... Thanks!

The "Select Track" button was not responsive in LANDSCAPE mode, but is response in PORTRAIT mode. Ie. by rotating the tablet, then pressing the Select Track button, the app progresses the to correct page. Perhaps this is an issue specific to my setup. After setting the track parameters, i rotate the tablet back to Landscape more to use for monitoring track lap sessions, as required by the app.