iPhone 12 mini touchscreen issues

Is anyone else having intermittent touchscreen issues with their iPhone 12 mini where it randomly won’t register touch input?

TLDR: my phone screen stops registering touch input randomly only when inside of a case and also with a screen protector on. With just the case on, the screen is fine, and with just the screen protector on the screen works fine. It’s only when they’re combined that my screen goes all janky.

I got my 12 mini today, went to Bestbuy to pick up a screen protector, installed the screen protector, put the phone in the Silicone MagSafe case and set everything up. Everything seemed fine until I noticed that the touchscreen was not responding like it should to touch input. I noticed that the screen would only act up if I had the case on. When I took the case off the screen was responding exactly as it should so I figured it was an issue with the case. However, my sister had also gotten her iPhone 12 mini today and we tested the MagSafe case on her phone but hers didn’t exhibit the same problem.

At this point I decided to pull the screen protector off and test again with and without the case on, and the touch input issues were gone altogether. So I figured, “okay, maybe I got a bad screen protector,” so I went back to bestbuy, returned what I thought to be a faulty screen protector, purchased a Zagg Invisible Shield screen protector, and had them install it for me. But when I powered my phone back on in the car, the screen still wouldn’t register touch input correctly with the new screen protector while in the MagSafe case. I can still take the case off and the screen works fine, but inside the case with a screen protector on, the screen starts acting up.

Finally, I decided to try a different case altogether. We went to Target and I put on a generic non-MagSafe case and the screen issues returned. I’m not sure why but it seems like the issue only pops up when a case is on the phone while also having a screen protector on. If I take one or the other off everything works perfectly. Does it seem like my device might be faulty?