Thank you for your post!
There are instances where a File will close after a certain period of Idle time. Is the file you access Local to the Device or is it hosted by FileMaker Server?
hi, the file is local and consists of one main file and three small accessory files opened by the first one.
Thank you for your patience on this. It doesn't seem local files should be closing out due to a lock screen. I have tested this with FileMaker Go 15.0.2 on iOS 9.1 and iOS 10.
-Do you get any message when unlocking the screen?
-Can you reproduce this with a New File / Starter Solution?