-For grouped products (3 products linked) the QUICK VIEW page is not responsive on phone device (iPhone X).
-The product PAGE is not responsive as well.
-Thank you to see the screenshot.
PS: The problem is not showing with Chrome Inspector (programmer tool). You need to check with a real Apple device.
May I ask you how did you check it? Did you use an Apple phone device? Because I used An Android device and google chrome inspector and we cannot reproduce the error with that.
You need to use an Apple mobile device to see the problem.