Are you having trouble with the screen on you iPad Air 3? I have to restart once or twice a week, or it starts delaying response. Support seems to has the attitude that that is normal.
Not a big deal to restart, but definitely not normal. I’d insist on speaking to a second tier support tech. Something needs fixing at the system level.
I haven’t noticed any screen problem. I do find I periodically need to kill all open apps and restart, maybe once a week. I usually find I’ve got 20 - 25 apps open and things start to get weird (I’ve had the same problem on my iPhone 6 Plus for ages). My ancient iPhone 6 Plus has 16 GB of memory (I think) and I bought an iPad Air with 256 GB of memory so I wouldn’t have to worry about these problems ever again.