“it sounds like it's been a very long time since you were on gand ”
If two or three months is a long time, then yes. Actually, I have spent most of my Combine time on Gand. It amounts to months hunting there.
“The order of operations for environment damage and daily healing is 1) damage and 2) healing, so you might have not seen the damage event and healed more than you were damaged (especially since hot/breathable is 5% damage and you heal 10% per day). ”
If the PC healing immediately after damage cancels the environmental damage event message and it's not displayed displayed, then that explains it. If it doesn't prevent the message from been displayed, then it's highly unlikely that I missed it for so long. Actually, extremely unlikely.
This merits another question; why the 10% healing after the 5% damage didn't happen on Kiffu?
However, I'm now curious about this subject. Next time I'm on Gand, I'll do some tests. That's not going to happen anytime soon however. I'll go to Shadola for my next force test, and that's on Skeebo. I guesstimate still a few months left for that. Then I'll stop by Gand.