I'm working on a legacy project that used Webforms. There is now a bug occurring on our production servers where a few of the web pages will show source code. I cannot replicate this on our test servers or by debugging it.
If it shows source code it will persistabtly show source code until the in-private/incognito window is closed and a new one is open.
It will occur about 50% of the time (out of 100 recorded tries it failed exactly 50).
This is a screenshots of some of the source code I'm seeing:
and
A commonality between the pages that break are that it uses AjaxControlToolkit, however there are other pages that use AjaxControlToolkit that aren't breaking.
Additionally, when I try to hit these pages they don't hit the page at all. If I'm not signed in they should redirect to the login page and they don't even do that.
