Ah, interesting. I also observed this when I accidentally forgot to enable the hardening.
But my understanding is: when the host running the plugin has the hardened runtime enabled, then also the plugins need to have the correct entitlements; otherwise that would put a big hole
into the whole security philosophy of “hardened runtime”, no?
At least here @op414 seems to have experienced this. I am not sure if there are hosts out in the market where you currently run into this problem, but i thought its better to err on the safe side.