This is an old thread, but the problem is still very real. I have been running Destiny/Destiny 2 on my PS4 for years without an issue. In fact, three PS(x) in my house with no issues. One PS4 was upstairs and I've always had to run it on WiFi. But, I recently ran Ethernet to the PS4 and started having this "Canary" error. Every time I'd get the error, I'd immediately "Test" my PS4 internet connection and despite saying I had up to 450Mb down and 20Mb up, I was still getting kicked out. I checked all my Ethernet connections and even remade a couple that I thought might be "iffy." No dice. I did everything people say to do to fix it and nothing. I finally moved my Netgear Extender into the same room as my PS4 and made it a "Network Extender" instead of a WiFi hotspot, by running the same ethernet cable that had been going to my PS4, straight into the Extender. And then, I connected my PS4 to that same Extender via 5Ghz Wifi. I haven't had the Canary error since. So, to recap: Same cables, but only now I'm running my PS4/Destiny 2 on WiFi and I'm not having any issues. I "suspect" what could be happening for people with faster connections is that the game is sending data requests to the Bungie servers faster than they can or are programmed to respond and when the client instance of Destiny doesn't get the response it expects, it logs a "disconnect." It's just a theory, but as a former network engineer, I think it's fairly sound.