This issue is a bit difficult to reproduce because it happens after a unintentional exit or browser crash (when loading large meshes for example, an astrocyte). Attempting to recover the state from the local browser history causes a previous tabbed layer "foo" to be renamed "bar1" where "bar" is the neighboring tab.
It's annoying but a minor issue, just a bit jarring when looking for the previously named tab. It appears that the information in that tab (annotations, for example) are retained ; only the tab name is changed.
Chrome 90.0.4430.212 ; Windows 10 Enterprise, v. 1709 build 16299.1932