I am having the exact same issue.
For this example:
It's only happening on his laptop, not his iPad or iPhone.
It only happens when a participant presents their screen.
In addition to the blocky green screen, the remaining participant video is choppy.
System Model HP EliteBook 840 14 inch G11 Notebook PCProcessor
Intel(R) Core(TM) Ultra 7 155U, 1700 Mhz, 12 Core(s), 14 Logical Processor(s)
BIOS Version/Date HP W70 Ver. 01.04.01, 11/22/2024
Name Intel(R) Graphics
PNP Device ID PCI\VEN_8086&DEV_7D45&SUBSYS_8C26103C&REV_08\3&11583659&1&10
Adapter Type Intel(R) Graphics Family, Intel Corporation compatible
Adapter Description Intel(R) Graphics
Adapter RAM 2.00 GB (2,147,479,552 bytes)
Driver Version 32.0.101.6127
This is happening regardless of being on the dock or not.
Dock:
HP USB-C/A Universal Dock G2
All driver and firmware updates have been implemented.