In T230588#5419320, @Lucas_Werkmeister_WMDE wrote:

I think all the items that were updated during the breakage, and were not updated since then, would be broken now – their data was imported using the swapped Ps and Qs, and then after the fix it’s swapped the wrong way. We should be able to get a list of all potentially affected items from recentchanges (Quarry) – @Smalyshev is it possible to tell the updater to re-import those specific entities?

In T229604#5387497, @Ladsgroup wrote:

I'm working on it. It should be back online now with the change I deployed but with missing i18n messages. I'm on it.

affects all pickers - units, dates, language :(

Same bug as reported here: https://phabricator.wikimedia.org/T229604

It looks like the problem is back, stopped working again just now :(

Now fixed on my end 👍

Can confirm: The problem started around 17:45 GMT +1 and affects all browsers (Firefox, Edge, Chrome and variants).

I'd like to add that the same problem also affects property/value suggestions. Started evening/late afternoon May 1. Tested Google, Firefox.