I have a relatively small app, a couple of views managed by a StackNavigator.
I have three custom fonts (TTF), used throughout the app.
The app works fine on the simulator for both Android and iOS - custom fonts display as expected.
I have now begun submitting my app to TestFlight and running it on device - two separate iPhones, so far.
When first loaded, the app works as expected and the fonts display correctly.
However, when the app goes into the background, and then is pulled into the foreground again, the fonts revert back to system fonts. (The page that is pulled from background actually looks correct, it is when the stack switches to another view that those fonts are incorrect.)
If I force close the app, then relaunch, everything is fine again until the next time it goes into the background.
Any thoughts on why these resources are not displaying?