I agree, headgears really shouldn't impact gameplay in any way. And yeah, I took a look at the screenshot and I can see how tricky it is to spot the restore cell there. I'll look into adding an option to disable headgear effects for better visibility, and if that doesn't work out cleanly, I'll probably remove the effect entirely.
Thanks so much for the feedback and 5-star rating, and also for being the Visibility Turtle. You're helping make the game better for everyone :)