Shared Document not allowing Track Changes with multiple editors at the same time.

I'm having and issue with Teams where two people are editing the same Word Document that is shared through Microsoft Teams, and "Track Changes" is on. After a period of time the program malfunctions. Usually this is in the form of one or both of the editors not able to save back their tracked changes. This means that in order to add the tracked changes you need either redo them with only one person editing the document at a time or combine files using Word's "merge documents" feature. The problem is that you don't know when the program malfunctions. It doesn't let you know there is a problem until you hit save or go to close the document. This means you could lose/have to redo hours of work without knowing until the end. Since usually documents like this are set to auto-save, you wouldn't necessarily know there is a problem from frequent saves because you would naturally assume the document is being continually saved automatically. This might be a Sharepoint issue, but as I understand it Onedrive, Sharepoint, Teams, etc. are all basically just different UI's of the same thing.