The nano shield does not lose energy.

Thanks, we'll have to look into that then. Just for reference, could you provide a screenshot of your inventory and if installed the curios slots and a list of armor modules you are using (just in case something might interfere or behave weird if used together)

Curios off

do you have a battery/energy crystal in your inventory that might be charging the shield?

(Not saying there is no bug but thats just one possibility)

Hmm, maybe I'll check again, sorry!

I checked again. The problem is relevant.

This is kinda thing in vanilla.
You need to deal a certain amount of damage to get the shield damaged...
At least that is what we found out when researching this behavior the first time.