I've created empty local git repository through console, added origin url (Stash running on local server) and did initial commit with just .gitignore. Then I added another remote url (bitbucket) in the same repo, pulled source from that url and committed to local repo (stash). Then I opened SourceTree and my repo and I could see all commits from both remotes. When I clicked on commit from bitbucket remote (date was before I created local repo) ST crashed.
Now when I open ST and do the same, commit is properly displayed.