@Nimdil could you specify which browser and OS you have. Also try it in privacy mode in a few different wikis. Thanks!

OS: Windows 10
Browser: I tried on Google Chrome, Firefox and MS Edge plus Firefox Private Browsing. I used Edge because FF and Chrome tend to have some extensions installed while Edge is vanilla by design and I use it only on such occassions (so when I need to see s.t. in vanilla settings)
Wikis: mediawiki, also my own which is pl.dogsportpedia.org/wiki

Change 286474 had a related patch set uploaded (by Yurik):
Match modern module loading in core

https://gerrit.wikimedia.org/r/286474

Change 286474 merged by jenkins-bot:
Match modern module loading in core

https://gerrit.wikimedia.org/r/286474

Change 286774 had a related patch set uploaded (by Dereckson):
Match modern module loading in core

https://gerrit.wikimedia.org/r/286774

Change 286775 had a related patch set uploaded (by Dereckson):
Match modern module loading in core

https://gerrit.wikimedia.org/r/286775

Change 286774 merged by jenkins-bot:
Match modern module loading in core

https://gerrit.wikimedia.org/r/286774

Change 286775 merged by jenkins-bot:
Match modern module loading in core

https://gerrit.wikimedia.org/r/286775