autopopup dialog stops downloads for new files

I have two que lists for two different servers.
One server requires CAPTCHA so from time to time it pops up a dialog.

Problem is that once the dialog pops up the program waits for user response and doesn't start new downloads.
Even the server that doesn't require CAPTCHA doesn't continue to download new files.

I haven't been able to verify this completely but I've noticed it quite a few times.

Yeah, this bugs me too. It would be nice to have a "silent" option that would prevent dialogs from blocking other downloads. Maybe it if this option is set, it would just mark it as an error needing human involvement and move on to the next download.

I think the best solution is to distinguish the different servers/plugins.
Each plugin should manage its own que list and won't interrupt other download servers.
Each server has its own system and CAPTCHA scripts. Some don't even have human recognition mechanism.

Is it possible to make each popup dialog unique and would relate only to the server/plugin requested?