I can’t think of any reason why OS and OG would behave differently — they use the same chip (ESP8266) and at the moment the firmwares for both use the same ESP core version. I don’t think it has anything to do with Blynk either — that’s just a optional feature for OG — Blynk is not turned on by default, and the built-in web interface is always available, just like in OS. It’s certainly true that OS firmware is much bigger and more complicated than OG firmware. But I can hardly imagine why it would make a different in terms of staying connected to the same router.