Error updating ubuntu 24.04 with Squid web proxy

[francismlg]

Hi,
I have installed Ubuntu Desktop 24.04 (also happens with ubuntu server) and when I run apt update, I get hash sum mismatch errors.

It's a virtual machine on Proxmox connected to OPNsense 24.1.9 with Squid web proxy and local cache.
If I disable the Squid service (and revert firewall rules), the apt update command works without issues.
I have deleted the files in Squid's cache directory on OPNsense, but the problem persists.
Any ideas?"