The link-generation between 1.34 and 1.35 must have be changed.
With SpecialNamespaces you can create Namespaces, with canonial and default true, and aliases with false.
In 1.35 these aliases are no longer used to generate a link in the wikitext, it will generate a nowiki linktext like [[PS2:Resident Evil|Resident Evil]] instead of a link with this target.
as described here: https://www.mediawiki.org/wiki/Extension_talk:SpecialNamespaces#Linking_is_incomplete_in_1.35
Tried referenced Version for 1.35 and master, but both are the same version.