I have two umg buttons with two button styles as variables, when i click one button I swap styles to give effect of selected tabs, I wanted it so highlighted tab had a negative noise letting a user know it was already selected.
Changing style (with designated sound cues for click) failed to change audio so this is impossible atm
I was able to reproduce this issue on our end. I have written up a report ( UE-18801) and I have submitted it to developers for further consideration. I will provide updates with any pertinent information as it becomes available. I have also included a workaround that may be viable depending on your needs. Thank you for your information and time.
Workaround:
You could use Play sound 2D node with on clicked event. Note you will have remove sound from style of button.