Big Sur 11.3 - UPDATE ISSUE - Breaks Thunderbolt Bridge!

I'm putting this info here to warn people:

Be aware, if you update to Big Sur 11.3 it will break the Thunderbolt bridge (on my MacBook Pro at least). I updated and I can no longer connect to my QNAP NAS via T3-T3 connection, (an Ethernet connection with T3 adapter still works). I spoke to Apple, there's no fix so far. Some forums are saying the only solution is to go back to 11.2 or upgrade to 11.4 Beta, (it may not be an issue with M1 Macs, don't know for sure). I hope this helps someone!

Install MacOS 14.4 beta update it will miraculously start working again.

It's all Apples fault for trying to restrict port access with greater security.
Actually the beta helps facilitate the Thunderbolt bridge connection now, making it slightly easier to enable.

Yes the Beta has been far more stable than final working version of MacOS 14.3.
Which crashed on boot and took 5 minutes to load when the Thunderbolt 3 connection was plugged in.
Huge mistake as earlier betas of MacOS 14.3 had the TB3 Bridge driver fix.

Apple should rush the 14.4 MacOS release so editors don't freak out.

If you use fixed IP links and have the DNS on the same network it is possible to get it working but it's still VERY flaky.
It will drive you crazy so wait before you install MacOS 14.3 or unfortunately install 14.4 beta if you already have 14.3 installed.

WARNING!!!
Trying to revert to 14.2 will drive you crazy.
You can't directly go back with Time Machine to 14.2 in one step.
The added security upgrade will add a step to confirm that want to install from Thumbdrive.
Then when MacOS is installed you will have to add the apps and settings from the Migration tool and your preferred time machine backup.

I normally would not recommend using a beta on a working business edit suite.
But these are extraordinary times and hopefully Apple will realize what they have done and rush the update to MacOS 14.4.