"Do you want to save changes?" - Why?

Hi,

I am showing an Entity in a read only screen so nothing can be modified by the user. I do update some FileDescriptors and commit them. The user has the OK and Cancel buttons as normal on an Entity edit screen, and clicking Cancel pings up the “Do you want to save changes?” prompt.

There shouldn’t be any changes needing changing so why does it pop up? Can I see what elements it thinks has changed?