Simplest use: push buttons are connected to digital I/O on Nodemcu. After update all pins, which are selected in the app become activated and no reaction to button pushes is seen on the pins. there are 2 different boards in different projects - all “got ill” a couple of days ago.
Luckilly I have just installed older apk. Now it works fine
You need to install the latest apk (2.16.7) and update your local server to the latest one. We have moved to separate push setup for the local servers.
updated both sever and app. Instead of four, only one remains activated despite BLYNK_CONNECTED() {
Blynk.syncAll();
}
present.
guys, your latest trick is crappy.
I would be grateful for reverting to the last stable state. I enjoyed it about 2 years
Since you have already done this, then simply revert back to the last LS you feel comfortable with… looks like v.0.7.2 from 2015 is still available 
https://github.com/blynkkk/blynk-server/releases
But I would recommend something more current, like the latest version, which is rock solid with virtual pins… the end result is much better.