Tried to update Help:Pickle and keeps getting an error message "Translation unit markers in unexpected position." Edits just before this is without any errors. The line into identifying border, edge and corner cases are changed with into into identifying border, edge, and corner cases (ie. added comma). This edit is done by the plain old wikitext editor (diff). That edit work as expected. If the text then are changed by WikitextEditor2017 then the error message pops up.
This might be related to T154500: Changes made using NWE are blocked by Translate extension but copied into OWE they're accepted?