I am not sure why this is happening - might it be that you use ,Auto Destroy" on the sound when you spawn it into the world and therefore it is destroying itself before you ask it to play again? This is just an idea… 
maybe this is not the problem. But if you dont like the delay thing - maybe you can play ths sound using Quartz… Dan Reynolds has good explanations for that on youtube here: Rough Introduction To Quartz Unreal Engine Subsystem (UE4.26) - YouTube nad about quartz: Explaining That Quartz Is A Scheduling System To Resolve MultiThreaded Timing Issues - YouTube
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