get "Property not in account? when checking robots.txt

I see many URLs with status Excluded in search console google, when I click on "TEST ROBOTS.TXT BLOCKING" I get following error:

Property not in account

You are verified to see sc-domain://, but it's not in your account.

when I click on add property now nothing will happen

when I change URL in the browser from https://www.google.com/webmasters/tools/robots-testing-tool?siteUrl=sc-domain%3Amysite.com&path=&utm_source=search_console&utm_campaign=index-panel&hl=en to https://www.google.com/webmasters/tools/robots-testing-tool?siteUrl=https://%3Amysite.com&path=&utm_source=search_console&utm_campaign=index-panel&hl=en it asks me to add the URL as a property again; while I already added domain property

I also cleared my robots.txt to be sure nothing is blocked yet after more than 8 days I see about 1.5M URL blocked in search console

I managed to duplicate the issue. Seems that that tool does not work when you have verified at the domain level. The domain level properties are reasonably new and don't support all features yet. But it should provide a better response.

A work around would be to also verify at the url prefix level where the tool should work.

I've reported the issue under the help->send feedback option.