Can't reproduce it on Firefox 54 and Chrome 59.

Sure? I can replicate it in both those browsers incognito window :/!

Alright, you were correct. It was my bad. I just opened the same link twice. Apologies for the same.
Well, this ::after pseudo-element is causing the trouble. The ::after pseudo-element is not used here.

It would be good to also add something like

.footer-info.hlist li:after {
	content: none;	
}

.footer-info is the list where enwiki has "Text is available under the Creative Commons Attribution-ShareAlike License...". In ruwiki, there's more than one item in that list, and it's also not improbable possibility for other wikis.

And one more .hlist-related issue in MinervaNeue: conflict with local .hlist (present on enwiki, ruwiki at least).

.hlist.hlist-separated li:after {
	content: '•';
	font-weight: normal;
	...
}
.hlist.hlist-separated :last-child:after {
	content: '';
}

As this rule overwrites what I suggested in the previous comment, that one should be updated too:

.footer-info.hlist.hlist-separated li:after {
	content: none;	
}

Unfortunately, I'm a total dummy in submitting patches.

Change 382882 had a related patch set uploaded (by Jdlrobson; owner: Jdlrobson):
[mediawiki/skins/MinervaNeue@master] Avoid clashes with MediaWiki:Common.css for hlist rules

https://gerrit.wikimedia.org/r/382882

Change 382882 merged by jenkins-bot:
[mediawiki/skins/MinervaNeue@master] Avoid clashes with MediaWiki:Common.css for hlist rules

https://gerrit.wikimedia.org/r/382882

@Jdlrobson That's cool, but without font-weight: normal !important;, the bullet will be bold in enwiki, where bold interpuncts are used by default.

Sigh. Ideally these hacks wouldn't be needed. They shouldn't be in MediaWiki:Common.css if they are not compatible with Minerva.css. These hacks sadden me :*(

The bold doesn't seem to have any effect for me...

Why not? https://en.wikipedia.org/wiki/Life%20(disambiguation)?useskin=minervaneue
Without font-weight: normal !important;