Right now, I don't have much time to respond to all the bugs because of personal issues, but I've checked the possible HAZMAT bug reported by AFEM and there is a small mistake in the script. When you press the 'Go to fire station' command while there is a civilian inside, the game thinks it's an ambulance which should go to the hospital. Although I've never seen the problem with civilians not coming out of the truck after decontamination.
That shouldn't happen. Is the command greyed out or does nothing happen when you press it?
That should work in (Deluxe) freeplay, but I will check it out. I am almost certain it should work though.
There are a few known problems with the wye after trying to pick it up. A floating hose with nozzle remains and you can't do anything with it. Unfortunately, I haven't been able to fix it. This problem shouldn't occur everytime you try to pick it up, it happens maybe 1 out of 15 times. It also seems to happen randomly.
Hoppah
For the VIP Escort mission, nothing happens when I press it. As for the Deluxe bug, it's not in freeplay, it's in the Deluxe mission where an earthquake occurs. I believe it works just fine in freeplay and other missions.