Abnormal dns PTR requests

Hi everyone

I’m facing a problem with my home assistant instance (LXC on Proxmox). In particular, actually once an hour it blocks my local DNS server (pi-hole) through a huge number of PTR requests.
I tried to solve reading on the forum but I think anyone solved the problem.
Anyone that could help me please?
I don’t want to solve the issue avoiding
the piHole to respond to the PTR request coming from all the IPs.
Attached a screenshot of the anomalous behavior.
Screenshot_20230327_193042

Many Thanks