Topic on Project:Support desk

After upgrading from 1.38.4 to 1.39.0 VisualEditir does not work at Flow (Structered discussions) talk pages having following error:

[Y48AWn@IyD2bEpG6yTCgxAAAAgY] Exception caught: Conversion from 'html' to 'wikitext' was requested, but core's Parser only supports 'wikitext' to 'html' conversion

Previously I had such problem but the patch helped to resolve the problem, but now it doesn't help.

Any ideas how to resolve the problem?

I have to raise the topic as the issue is not still resolved and still exists at MediaWiki 1.39.1