Screenshots reverting after cropping

Are you using iOS 11?

Several users reported this problem after the iOS 11 upgrade. I have not yet seen a solution posted here. It may be a bug.

You may want to report the problem to Apple using the feedback form: Photos for iOS - Feedback - Apple

I have this exact same issue, but it doesn't take 24 hours. It can be 6 hours maybe less. I'll take a screenshot, crop it, save it, then post it on social media or send it via text to friends and it is still cropped. I'll try to post or text it a few hours later and it has reverted to the full screenshot before I saved it.

I use and iphone 6s and am on version 11.3.1. I'm about to update to 11.4 but we'll see if that corrects it.