I downloaded the BBB the first day it dropped, my friend downloaded it today after patches 1 & 2, and when they tried to join they got the game version mismatch message. When they verified their game files it seemed they had 51 files that did not validate and required downloading.
After they verified, and patched, they were able to join. It cost us an extra like hour because of their net connection.
It seems like there’s some disconnect between the actual beta patching and the current 3rd beta patch. Maybe you guys could look into this issue, but it’s mostly solved on my end due to verifying game files.