I have been reading quite a few people having issues with this and concerns about this topic. Here is a quick and easy way to stop any issues that works with iPhones and iPads.
DO NOT DISTURB MODE! It works great but needs to be configured
Frst open up your settings menu and go to the do not disturb settings
Select the option for always. this will block all calls and silence texts from poping up while activated
On home screen or in app slide up the bottom menu and hit the moon to toggle do not disturb. Your good to go and can fly with out the interuptions of calls and texts!