Engine DJ Changing Transitions

I use Serato to prep and I have all of my transition tracks properly BPM gridded for the start of the transition so I can mix the intros. Engine has changed that to become the BPM of the song after the transition starts. Is there a way to stop Engine from changing the BPM? Would I have to make sure those tracks aren't analyzed?

In serato my track would look like this (Clarity Transition 100-128. 100BPM)
Engine changes the BPM to 128.

Thanks!