[Halloway]

 I first noticed it on #0520, 20-May-2018, this being the first Kodi 18 nightly I installed. I updated today from #0520 to #0526 and the problem was still evident. I am not using a DAC, my Pi3B+ is connected to an AV receiver via HDMI.

H. 

Did you manage to recreate this one? Has anyone else had the same problem? 

I haven't, no. If you can identify the first of these builds with the issue it may point someone in the right direction. 

 I've started testing earlier builds but I've got a problem in that I can update to #0401 (in which the audio glitch is still evident.) but if I try to update to #0301, it won't reboot after installing. It just sits there with the big square rainbow. Am I missing something?