PS: on further investigation, that conflict does not exist if you turn on wppizza->setings->”I am using a caching plugin”
(which you want to turn on in any event if you are planning to use a caching plugin)

but it needs fixing nevertheless

just for your info

there’s something else wrong
the plugin makes no distinction between edge and chrome (or anything else for that matter)
it’s also been developed on chrome .though that’s neither here nor there

can you post a screenshot of the plugin settings please ?
as you might imagine , it all works just fine here

can you also please change this back to autocomplete on your site so i can see whats going on now . thanks

(the “Undefined variable: resHour” is immaterial her and for now, and has to do with the preorder plugin and custom opening times, we’ll get to that )

So, just to keep you updated, the problem is the “ß” character (ä, ö, ü are fine). as it gets converted to “ss” on the frontend/autocomplete
as that does not match the original entry there are no matches between what’s entered in the backend and selected in the frontend so it will never allow selection

so at least we know now where exactly the problem is. i just have to find the place now where this conversion happens in the chain of events to be able to fix it

again, i’ll keep you updated when i know more

ok, as of v4.0.22 of the postcode plugin, the “ß” character now gets automatically converted to ‘ss’ when saving and using the “autocomplete” / “Show as Textbox instead of dropdown ?” option.

so, update the plugin and save your “streets” once.
I would think this all works then