Opening level immediately marks file as not saved (Unreal 4.27)

I’m relatively new to unreal, but this seems weird to me. I have a level in a project that has been saved, but when I open it up it it is flagged as needing a save before any changes have been made. I have a couple other levels in this same project that do not behave this way. Also other projects I have made do not behave this way. Has any one seen this sort of thing before and know what might cause it?