Steps to Reproduce:
It is displaying the same content as desktop site
A trimmed down version of the main page, which looks good on mobile view. This is the snapshot from the Internet Archive: http://web.archive.org/web/20200219221003/https://id.m.wikipedia.org/wiki/Halaman_Utama
I traced it down to this site operation on 3 March (https://gerrit.wikimedia.org/r/#/c/operations/mediawiki-config/+/570180/) and only now that I'm aware that T32405 exists.
I hereby request a config rollback for idwiki (it relied on mf- a lot); and in the meantime, I would spend time on fixing our main page layout so it looks nice on mobile view too.
On the other hand, I was disappointed that no one in idwiki community is notified about this change until it was done.