When a view's label has commas in it - the viewsreference field can't recognize that view.
In order to reproduce, just rename a view to have a comma "," in it's label. Then try to select that view using autocomplete field widget.
It looks like the issue is with the js/viewsreference.js where the selected item is treated as a collection of terms, while this most likely is never a case for views selection.
So, for example, when your view is named Blocks, pages and other things you get ""Blocks, pages and other things (view_id)"" as result - with double quotes, which then breaks view lookup on the back end
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2.0
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Thanks for flagging! Added one comment to the MR
We also need tests, but there is something similar already for brackets which can be a good example:
ViewsReferenceFieldTest::testViewWithBrackets() essentially but with now comma in the name instead
Thanks!