The current Tonfotos version (0.9.18.0) cites ‘image corruption’ on TIF files, but not on jpg files, when trying to view image file fullscreen. The files are not corrupted. Rolling back versions to 0.9.14.0 fixes the issue, until the auto updater takes over.
MGP can you please share those files for tests?
One such TIF image can be downloaded here: https://www.dropbox.com/s/vpt0fb1bgsahls2/IMG_0001%20%283%29.tif?dl=0
MGP thank you very much! I will check what causes the issue.
Fixed, update comes in few days.
Version with this fix is released.