I am facing issue where Behaviors are not always found when Drupal.js wants to fire them using Modifications / Recommended (optimized) settings meaning that eg: my nexus menu & map (+ other scripts depending on Behaviors) are not executed
If I reload the exact same page 10 times, it will work about 2 times - and there are no errors in the console
After investigation, my assumption is that it's related to Drupal.attachBehaviors from drupal.js being fired too early - where other deferred scripts haven't managed to be fully parsed yet.
Not loading:
Loading:
Note: By setting the default (safe) settings, I don't encounter the issue anymore.
I have also attached the har files for the 2 cases
Active
2.33
Modifier
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I left comment #46 here https://www.drupal.org/project/drupal/issues/3105024#comment-15727018 🐛 Drupal main javascript file can't be loaded with "defer" attribute after upgrade to 8.8.1 Fixed to describe the current state of this problem for me, now that it's recommended to uninstall AdvAgg on D10 and I still want to be able to `defer` all scripts, which was the functionality that AdvAgg Mod was providing.