Steps to replicate the issue (include links if applicable):
On a wiki where Parsoid read-views is deployed (or with an account that is in "parsoid always-on" setting), edit a wiki page; observe what is shown just after the edit in the read view.
What happens?:
The legacy parsing is displayed.
What should have happened instead?:
The Parsoid rendering should be displayed. Or, if not, at least the "Rendered with Parsoid"
Note
It's not trivial to see, because it STILL displays the "rendered with Parsoid" tag, and displaying the source is enough to get the Parsoid version in the source. But, the discrepancies between Parsoid and legacy disappear (... since we're, in fact, seeing legacy); inspecting elements in the browser shows legacy source.
It happens whether the edit is done with VE, whether in "visual" or "editing" mode, but not when editing with the "old" (pre-2017) wikitext editor.
Reloading the page shows the Parsoid output as expected.