I guess I missed this post when it was originally made, and while I think we shouldn’t necro a thread in normal circumstances, I want to try and help here. When you start missing sound effects it’s possibly related to a network connection problem.
There is a thread with blue replies here: Sound problem, missing soundeffects!
Please don’t necro that thread, but please do follow the advice provided in that thread. You can also post WinMTR results here, and I can help with those.