performasnce issue with McAfee endpoint security?

[Tubs]

Hello,

I noticed a strange behavior with the combination OPNsense 19.1, Windows 10 , McAfee Endpoint Security 10.5. Connection to WAN hangs dramatically (PING as well download speed).

I moved in a new home, got a new PC and updated to OPNsense V19.1 at the same time. All internet devices are running perfectly with the Netgear router from internet company. But wenn I echange the Netgear router with my OPNsense box the Win PC internet hangs, both over LAN and WLAN while iPhone, iPad and Android phones are running fine with OPNsense box. LAN connecton from PC to OPNSense box seems to work without problem.

When I disable McAfee endpoint security on the Win PC it also runs fine with PFsense.

Any idea where the incompatibility between OPNsense and the PC can come from?

I am pretty sure that there is nothing wrong with the PC setup as it is a standard configuration of a big corporate running on thousands of PCs in the same configuration.

[newsense]

Your info is allover the place and likely unrelated...

Please do a 12 in the console and ensure you're on 19.1.1 before anything else.

[Tubs]

Sorry. I was not precise. I am already on 19.1.1.
I did not recognized the automatic update some days ago.