- Go to https://ru.m.wikipedia.org/wiki/Заглавная_страница (or to other wiki) while logged out
- Open browser devtools
- Page title is specified as <title> — Википедия</title> ([empty] - Wikipedia) and not <title>Википедия — свободная энциклопедия</title> (Wikipedia - free encyclopedia)
Other skins on mobile do not have the same issue:
https://ru.m.wikipedia.org/wiki/Заглавная_страница?useskin=vector