@Ray_Foss, how often does your app fall into this problem? As I said, mine was just a bit of luck to get one of those to see this error. may I ask if you can try this: when you hit a host with the problem, can you try to connect with mongodb:// URL format instead of mongodb+srv://? I wonder if this has any relevance.
(from the same page on Atlas where you get the srv string, select oldest driver version)