From [Link Removed]
"There is still a bug happening with editing transformations on pause. If you play, then pause, and then edit a transformation, you have to press play twice to resume play (which will resume from the correct position).
Also in this case, the code from the wave editor is behaving correctly, but the audiocomponent is not. We send the play request to the AC with the correct code flow, but it will just execute the second time it receives it. "
Note: You also need to press Play twice if you Pause and then add or remove a transform to play it again
1) Launch AudioQA
2) Navigate to Assets > Sound Waves > Mono > VO and open voice_en_male_counting_1-10_seconds_looping
3) Right-click on the asset and select Edit Waveform
4) Add a Waveform Transformation Trim Fade
5) Play the Sound
6) Pause the Sound
7) Adjust the End Time of the Sound
8) Play the Sound
Play only needs to be selected once
Play needs to be selected twice.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-166248 in the post.