Just updated this morning to 6.0.2 on a Mac using Node.
Before the update, had a page that was pulling a sever action with a query string. After updating to 6.0.2 , it no longer works.
The querystring still shows in the url, but I cannot get it to filter results, and it will not display any data if I just insert the query string data on the page.
I tested this with my laptop which I have not updated yet and still had 6.0.0. Tested the page and it works perfect. Upgrade to 6.0.2 and the app connect files, querystring function no longer works. I also tried deleting the query string parameters in the Query Manager and re-create them, same results.
Before the update:
and after: