WowAce

What steps will reproduce the problem?
1. Create 8 separate unit groups, each for a separate raid group
2. Find an LFR group
3. Wait until someone leaves / joins

What is the expected output? What do you see instead?
The frames should appear/disappear every time a new person joins/leaves, but about 30% of the time the frames won't update correctly - for example having only 23 raid frames when there are 25 people.

What version of the product are you using?
v4.0.0-beta56

Do you have an error log of what happened?
N/A

Please provide any additional information below.
I'm including a PitBull4 WTF settings file.