EDIT The original title was:
I often cannot submit posts during night time (my time zone: GMT+1)
but I just found out that I have that issue on other parts of the day as well. (I just happen to be here more often in the late hours, so it's then that I notice it most.)


I am often getting the same error message that you get when spend too long with a reply (a functionality which, btw, I never understood the purpose of, but that's a different matter).

The difference is that, when it's just the cause that there is too much time between beginning a post and submitting it, you simply submit again and then it works, while in the case of the bug, this message keeps being renderend.

Eventually (usually the next) day, I am able to submit again.

The latest example is this post that I wrote somewhere around 2:00 PM I think (but it might also have been 1:00 PM or 3:00 PM), but were able to submit only minutes ago.

Same for me. For a while I would enter my text, copy it and try to submit. If it didn't take I'd log out, clear my cache, and log back in. Then I'd paste my text in and it would work.

But, not the second time... Sometimes it seemed like I need to do it for every post.

It used to be that I'd reply, submit, exceed session time, resubmit, done. Recently (just started a couple of weeks ago, I think, although I haven't been too active, so perhaps with the switch to https?) that hasn't worked. I successfully submitted a post last night, immediately edited it, and that failed; logged out & in twice before it was accepted.

Yep, that's what happens to me as well. I think I've noticed it primarily when editing a post.

I changed some settings, please report if it's better or worse now.

At least that one worked right away.

Based on the contrast before and after your tweaks, I will carefully assume that you might have nailed it If so, great work, thanks!!

I might have cheered too early: just had to relog to be able to submit a post