I've noticed when you're driving the SRV it's now not showing the fuel gauge going down to let you know it needs refuelling and most likely why you ran out of fuel (unknowingly) and got the 5 min Oxygen counter started. There seems to be a bug now with Horizons not showing the fuel gauge on SVG going down, and you only spot how much fuel is left when you dock back with the ship. Just had same issue and Oxygen counter started and when I made it docking back with ship, it showed 0% fuel on SRV - but before docking it said 100% fuel
And Yes, I know how to refuel and repair the SRV while driving around. That is not the issue, I didn't think fuel was the issue causing it to happen because it showed 100% full.
The Damage counter on the SVG is working okay, but the Fuel counter is not and always shows 100% fuel left. Just been driving around on a planet in the SVG for ages (and noticed it before) that the fuel guage is always showing 100% - when it should have dropped with the amount of time just spent driving around a planet shooting rocks and picking up resources.
I've not played for months and only installed the game fresh 2 days ago and noticed it happening now.