I have the same problem, VHG. I find it worse during the day when using my Samsung tablet. I have to keep restarting the tablet. In the evening, using the laptop, it's not so bad but it does happen.
I had that on IE, AB did become unusable. I changed to Chrome on advice from here and everything has been fine since however I said at the time I don't think a site should expect its users to change to a different browser to make it function correctly they should sort it out - I wonder how many shoppers amazon would lose if they were told you can only use this site efficiently on Firefox (for example).
Ah, I have been able to recreate that - I'll see if I can work out what it is.
It's not a change our end - we've not made any major changes to the back end for a little while. IE may have updated and stopped working with us as well as it used to!
I know very little about computer working, but use a Windows 7 and have the very same problem each time I am making a reply of any length. It comes up that AB is not responding, and when rectified all text is lost.
ukbod I wondered why an answer had been removed, I couldn't remember who it was but if you did you also not make reference to the severe no-no relating to 'blocks'?