Unfortunately we have yet to be able to reproduce this by taking any manual steps, and didn't notice anything in lower environments. So far once per day or so our multilingual site is marked down, and the default english version of the homepage serves a 404 until we resave that node, at which point it pops back in and loads as normal. The error we see in the logs is similar to what is mentioned above:
Warning: Undefined array key "route:[language]=en:[query_parameters]=:/ " in Drupal\Core\Cache\DatabaseBackend->getMultiple() (line 155 of /code/web/core/lib/Drupal/Core/Cache/DatabaseBackend.php)
We just updated to 10.3 and sporadically (so far once a day) the english version of our main homepage serves a 404 until we resave it, very frustrating. Did you find any better way to address this?
We are running into this issue trying to get to Drupal 10.2.x and Group 2.x. Was anyone ever able to figure out why that db update in particular was failing?
Thank you for this patch. Do we know when this might be released?
Any update on this one? Thank you!