nothing changed but internal_properties change??

What are the reasons that within the diff view of a window, I can see changes of elements I didnt touch? I know some reasons:
1. deleting a control in a window changes all on the same plane or tab-pane, maybe related to tab order.
2. Project -> Recompile and synchronize - some or all those actions change a lot elements
3. Opening a project changes the one of the main internal_properties in the <project>.wdp

I ask this, because I can't be sure, what changes are relevant or just reverting some stuff of colleagues, if I started working on an older commit. Btw. we are not using scm as its limitations make coworking impossible.

seach tags: git merge conflict push pull branch

My solution / workaround is to have another git repository checked out in the version before and using the compare the projects with "Projects" -> "Compare" -> "Compare 2 projects" whenever I'm unsure.