When toggling back and forth between NPP and AfC as a logged-in user, you can observe this warning in the response from the MediaWiki API:

{"warnings":{"main":{"*":"Unrecognized parameters: timestamp, mode."}},"pagetriagelist":{"result":"success","pages":[]}}

In ext.pageTriage.article.js encodeFilterParams() we could probably remove params.mode = this.getMode();. (ApiPageTriageList uses namepace parameter for determining what to show, not mode)

In ext.pageTriage.article.js url() we could remove timestamp: d.getTime() from the params object.