There's a special iron man mode in development if you press F5 on the GUI, only 5 quests featured atm where it will automatically gather items. Other than that the script can also be started in debug mode with F4 if you have items in inventory, but don't forget the requirements are quite strict for items.
I'm not sure, it's a problem with mirror mode itself, generally speaking most quests that contain dialogues may have issues
Not atm
Not currently handling trials
Mirror mode has always had some issues, I'm not sure if they were ever addressed, but some people seem to be able to use mirror mode if you set the delay to 50ms
Is that on mirror mode?
A new GUI version is live now, it has a load equipment option instead
Start in debug mode (press F4 on the GUI) if you want to continue a previously started quest, but make sure the bot wasn't moved/has same inventory as before stopping