I believe I have already seen this issue as a bug report somewhere, but cannot find it anymore. Please let me know if this is being worked on or if anyone has any ideas what to do against this: We are on Unity 2019 and at some point in the past a dozen of our prefabs have started changing every time the project is saved even though nobody has touched these assets. The values itself do not seem to change, but the order in which these modifications are saved to disk. This is causing a really big annoyance for us because we are working in a team and team members are constantly confused why these assets show up as changed and cause merge conflicts, when they shouldn't. Unity is notorious for setting files dirty even though nothing has changed, this is a well-known problem and other software such as PlasticSCM actually patches some of this up by ignoring files which have their timestamp changed, but not their content. However, in this case with prefabs, the contents change their order which causes a lot of noise in our version control system. Again, I believe this is a known bug, but please let me know what the status is, as I cannot find it in the issuetracker. Thank you!