Minor Possible bug with toxins mixing

[MrMagolor]

I encountered a weird thing tonight while attempting to make canbombs, unsure if it's a bug but it sure looks like one.

Steps to reproduce:

1. Set up burn chamber, open vent

2. Pump small amount of burn chambergas into empty canister

3. Attach empty canister to heat exchange

4. Watch as fire dies in burn chamber and heat exchanger temp starts dropping

The heck?