Thread gets some errors and then freezes

[aronax]

I'm running some simple bots in BAS, that just load a bunch of websites in order to gather cookies.
At some point in time (usually 10-12 hrs max) each thread gets some errors like these (check Thread #2 errors):

And that thread freezes. It doesn't stop, doesn't restart, it just keeps the last page it has loaded and doesn't do any other action. I've set timeouts for every action and a general timeout, too...nothing helps

Any ideas what to do to avoid these freezes?
Thanks