I attempted to freeze a track and got this incorrect warning.
It's telling me that the send to track 1 ("Room 1") is pre-FX and may sound different... except that the track I'm freezing is not sending to track 1, it's sending to track 12 (though it is indeed pre-FX).
After clicking Yes to continue, I get another incorrect warning:
"Some selected tracks may send from channels other than 1/2..."
As you can see, it's sending from 1/2 -> 1/2
I have made sure that only one track is selected.
This problem existed in 5.978 release, so I upgraded to +dev0528 and found the exact same problem.