Topic on 2017 wikitext editor/Feedback

Some days ago I activated this new editor in https://de.wikipedia.org/wiki/Spezial:Einstellungen#mw-prefsection-betafeatures . As I saw some features are missing (e.g. „Simple mode“ - hide refs etc.) or difficult to reach (preview, changes – already mentioned here), I turned back and deactived this new editor.

The old editor appeared, but if I activated the right toolbar button „Simple mode“, all in the edit area appeared in plain text without syntax highlighting, only the right toolbar was visible, and if I deactivated the toolbar button „Simple mode“, nothing happened.

I found a workaround: If I clear all Website data of wikipedia.org and then activate the old editor, it reappeared and worked correctly!

Sorry, the title must be Did it break functionality ot the older wikitext editor? but I cant change it anymore ;-)

And now I pasted the title and forgot to change it, it must be Did it break functionality of the older wikitext editor?