In-game explanation on skulled agents would be great

So I log in and accept rewards from my latest mission (which succeeded btw) and suddenly this appears. No explanation as to why this happens, no tutorial, no tooltips, no anything.
Obviously its a progression block to ensure we don’t level up too fast but some detail would be nice.

Yeah…it’s some kind of exhaustion/wounded whatever you wanna call it progression block.
Biggest issue with it is currently that it seems to have a visual, maybe cost of removal bug: Agent Cooldown (red) gets larger

Thanks for the link to the other thread. I do see now there is a blurb about it in the ? help section. Still a little popup would be nice.

It does seem pretty harsh though, 9 hours on my first and only agent below level 5 with a 9k MOF cost to revive her.