Have you used Android recently? Asking, cause in recent Android builds there is an option to turn off offline notifications. Is there a chance you hit it?
You are genius, I installed once again Blynk on my wife s android phone and there was turned off offline notification option inside android version of Blynk, I even didn`t know that there was such additional setting. Now I turned on offline notification, uninstalled android Blynk and it works on my iPhone.
Thank you for your support.