@pistiszk: I am only aware of the significantly delay when it was on firmware 1.0.0. With firmware 1.0.1 it works fine as before. You may want to perform a factory reset and try again.
@insight3fl: does the built-in web interface work? If so, then it’s not a problem with OG’s connection to your router, it might be the issue with your router’s connection to the Blynk server.