I'm having this problem that my controller looses one of my play:3s. Sometimes it works for a few days and then it's gone again. Really annoying actually. I have a boost only 15 or so feet away so it shouldn't be a problem. I have tried to connect directly to router which worked fine and then reconnect to wifi. Worked for a few days and then lost.
I did send a diagnostic right now: 892354290
Hope you are able to find the problem and have a solution.
Thank you in advance.