I am working in 2017 and i came across something I KNOW i had done the previous week - but seems to be back to how it was prior to my edits. I first assumed a project team member undid my work, but when i went to inquire, i learned that this is an issue that has been plaguing the project team for months now. They have just been quietly dealing with it (redoing missing/reverted work as they find it)- but has anyone else had similar experiences? is this a 2017 bug? or is the project file just seriously corrupted?