Check Adjustment Layers
Perhaps there are adjustment layers in the timeline that affect all the clips below it, and the preset layer was added above. Therefore, the adjustment layer does not affect the transition layer.
In this case, move the adjustment layers to the tracks above so that it also affects the transition layer.
Disable Auto Detect Log Video Color Space
If the adjustment layers are set correctly, but the color correction of the transition is still different, try turning off the “Auto Detect Log Video Color Space” setting. To do this, go to: Edit > Preferences > General