Aeotec Siren 6 random stutters

I searched and see mentions of stutters using these. I am using it as a door open indicator. Very occasionally we open the back door and the thing goes into a stutter fit and, forgive me, goes like da,dada,da,da,dadada, daaaaaa where it finally plays the last one correctly. It only happens occasionally and there doesn’t seem to be any external conditions I can figure out that cause it. I am suspecting a lack of timely response (ACK), but things don’t seem to be changing to cause it to happen and the stutter is crazy random. I haven’t really looked at logs because it’s only happened to me a couple of times. My wife mentioned it which, of course, elevates the issue. Any pointers or guidance?