Just checking “your history” and this came up from April ESP disconnecting (from WiFi after sending data from app)
Your ESP was disconnecting, like now, and when @Gunner asked you to provide your code we heard nothing more from you.
We can only help if you provide what we request as we are not going to give you a list of the 74 things that could be causing the disconnects and the associated fixes for each of those issues.
If your sketch is “top secret classified” then just say so and we will work around it and sign the Government / client NDA’s.
Best way is to start with the basic standalone sketch and run it for a few days until you know you have a solid connection to Blynk. Then you know any future problems are almost certainly down to your bad coding.