I am using Good Notes for iPad for studying and whenever I want to insert images from Dropbox, the menu that opens to select the image often stays black and it takes approximately 10-30 minutes until it works again. restarting the app or device doesn't help, only waiting fixes it. Sometimes the problem occurs right after opening the app, sometimes after a while of working.
I already reached out to Good Notes Support and they said: "I believe the problem could be related to Dropbox's File Extension couldn't load/retrieve your images from Dropbox's server for some reasons. If you notice this issue is occuring frequently, kindly reach out to Dropbox Support team and see if they have some solutions (as the file extension for showing files from Dropbox is maintained on Dropbox side). "
So, what can I do?