The Powerapp works perfect on the Web, however when using it on the following IOS devices it freezes for a long period time and sometimes produces timeout error. Not sure if it has to do with the function sending the pictures to MS Flow or not, but other PowerApps without MS Flow integration don't behave the same.
iPHONE with IOS 10.3.2 (14F89) - freezes, was able to eventually send the pictures after waiting 10 minutes or so, then froze again after that action.
iPad with IOS 10.3.1 - - freezes, was able to eventually send the pictures after waiting 10 minutes or so, then froze again after that action.
Then when I run the app on the device you mentioned, iPhone(10.3.2) and iPad(10.3.1), seems that I am getting the same issue with you. It takes me about 2 minutes to save the image to SharePoint library.
While when I run the app on Android(6.0), seems that when I click the button, the pictures can be saved to the data source immediately.
I guess that the cause might be iOS has lower success rates than Android devices due to memory limitations, as the images taken by a camera control on iOS devices can be very costly on the memory consumption.
I will try to report this issue on my side. I will back to you once I got any response.
Best regards, Mabel Mao
Community Support Team _ Mabel Mao If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.