There is a new system of resolving names of namespaces. In case of a possible conflict (namespaces with the same abbreviation) a number is added to one of them. Every time you modify something in a model file that contains one of the doubled model element namespaces, the abbreviations are corrected. The result is that you may have several files in git with tens of changes, even though there was no actual change in the file itself. This makes looking at the change log and diff more complicated.
It would be practical to have a script / utility that would rename all these namespaces in the whole model in one batch.