This is because of this code in history-alpha.js
wikiGetLink should include the query string parameters as well.

		currentUrl = mw.util.wikiGetlink( title );
		// initial history state does not contain title
		// run before binding to avoid nasty surprises
		History.replaceState( null, title, currentUrl );

bingle-admin wrote:

Prioritization and scheduling of this bug is tracked on Mingle card https://mingle.corp.wikimedia.org/projects/mobile/cards/1255

Change 86211 had a related patch set uploaded by Jdlrobson:
Ajax Page Loads: Don't drop the query string

https://gerrit.wikimedia.org/r/86211

Change 86211 merged by jenkins-bot:
Ajax Page Loads: Don't drop the query string

https://gerrit.wikimedia.org/r/86211