7.0.6 TinyMCE not loading resulting in empty posts/comments

From the very start, my members kept posting empty comments. I noticed it only happened after you write and post a comment when TinyMCE panel wasn't loaded - or it was loaded but it wasn't showing anyway. By trying I found out that no comment written without TinyMCE box loaded will be posted properly. The only thing that helps is to load the page (in many cases several times), until TinyMCE loads into the comment box, or to clear browser's cache and reload (still not 100% solution, several retries are needed sometimes).

And yes, TinyMCE is enabled in the advanced settings. 

Solution?

P.S.: This doesn't happen only for text on profiles, it happens site-wide. Although, I never experienced it in the edit profile / description TinyMCE, which is weird...

Is this problem reproducible on the official boonex demo:

http://www.boonex.com/demo

?

I doubt it. I've searched for some clue on the forums but haven't seen any trace of anyone having the same problem. And frankly, I have almost zero time to go to the demo site, join, and try to recreate the problem there...

However, my members keep posting empty comments due to TinyMCE panel not being loaded into the comment panel right from the very beginning of the site's start. So, I'm interested to know if anyone has noticed their TinyMCE loading randomly? When sometimes it is in the comment panel, sometimes it is not? (I've only seen forums where it didn't load with the proper theme or buttons, but no one mentioned it wasn't loading at all)...

I use caching for everything as per admin panel but the individual blocks have no cache set. This is the only thing that comes to my mind that could be making problems with my TinyMCE/empty comments/posts, but if there are more people with the same issue, maybe someone would have a better idea as for the source of troubles...?