First 2026 Linux update and now unable to share third screen?

This looks like a Linux screen sharing limitation introduced in the newer update.
On Linux, Zoom can struggle with multi-monitor setups, especially when using NVIDIA drivers.
You can try switching the screen sharing option to share a single window instead of a full screen.
Also check if hardware acceleration is enabled and try disabling it.
If possible, testing with a different display layout can help confirm if it’s driver related.

Can you advise how you installed the December version?  I'm going to roll back as well

Hello there, 

We're sorry for the inconvenience you experienced. 

To assist with troubleshooting this issue, kindly submit a support ticket to our technical team. 

Kindly include this information:
What system are you using? X11 or Wayland? Which client version has the issue, and which older version worked correctly?
What is the exact behavior of the issue? Is it that other screens cannot be selected in the Share Select Window, or can other screens be selected but nothing happens after clicking Share, or does the screen sharing fail?
How are the multiple displays connected? Are they using a hybrid setup with both a discrete GPU and an integrated GPU?