Hello,
we have problem on our board. When you logged in incognigo mode (in normal view sometimes too)  you can walk on site and everythink is ok. But when you click link to main forum page you see page for guest and you are redirected to logged version with param ct=... You can see that situation on movie

I know when this parameter will be set, but we have problem with this from about 4 December

 

It's just after upgrade to 4.4.9 which was also performed on the 4th December.
I do not see it on the other sites with IPB 4.4.9.x

Where does the ct= parameter come from in this case? I've seen that behavior with sites using a custom SSO solution, does that apply here?

@bfarber thanks for Your reply, we had provided more data on ticket 41543.

Could You please take a look on it?

In general, we are opening incognito mode of Chrome, then we are clicking login button, popup occurs, we provide login credentials. We are logged in. Then we click forum page, and we are in guest mode and site automatically redirects to logged in mode with ct= parameter.
This is visible on the provided screen-movie.

8 hours ago, Spanner said:

you are redirected to logged version with param ct=

Unix timestamp. Often happens with browser's Adblockers.

no adblockers - chrome incognito

Any updated with this issue?

Yes and no. We know that if we disable "cache main page for guest" it works. If it is on, there is a problem

Now I see the problem with ct= still occurs on Android phone with Chrome - normal mode.