Factory reset it in menu. Basically start over. Then rebind each model. Just incase you changed something & not realised.
Just basic things we can tick off the list.
Next would be wiring of power to rx & to fcb. & esc's to fcb, Pictures say a thousand words.
With top plate on & off. Side view. To see if anything touching any carbon. Then lastly would be cleanflight settings.
How to reset? I found a 'factory reset' menu in the 'version' page 5/9 of the radio setuo menu (you reach radio setup by long pressing the button between page and exit buttons).
... That's exactly what Moz said to do, factory reset it ... follow the directions in the manual to factory reset the TX then reload your models.
After you've got everything the way you want, you should save copies of those files on your 'puter using Open TX so next time you goof up the settings
you don't hafta start over again from scratch. https://marketchangers.files.wordpress.com/2016/12/frsky-taranis-q-x7-start-guide3.pdf