Setting the Play Sound 2D start time after 0.0 will not apply when a input event is triggered, The sound will always play at the start.
This does not occur in 4.27
Actual Result : Sound file starts at the beginning of the sound file
Expected Result : Sound file starts at the designated time
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-151238 in the post.