I have noticed that 4.8.5 no longer keep query tabs active. Previously I could have 10-15 tabs open and re-run the scripts in each as many times as I wanted over hours and days - now I find that most tabs get deactivated (the "hour-glass" splits with the "Transaction status check failed" message) after a relatively a few hours, and I have to close the tab and re-open a new one (which typically also mean I'm loosing the content of the scratch-pad etc unless I manually copy it over to the new tab).
It is really annoying....
Is this change related to some kind of configuration setting, or is it a regression bug?