I am back online with the original FW 0.9.5 which is working (v0.22 and v0.30 NOT) but connection to cloud is unstable.
So what is absolutely NEW is that iOS Blynk App definitely goes down max. within 2 minutes!!! and connection from ESP or Nano is reconnected. Relation between crash of iOS App, Buffer overflow and reconnection is confirmed!
iOS App NEVER gone down when I used ESP8266 Standalone and did not use Slider Widget. 
There is print Serial Monitor:
[19] Blynk v0.2.5-beta
[20] Connecting to wireless2
[3306] IP: +CIFSR:STAIP,“192.168.1.77”
+CIFSR:STAMAC,“18:fe:34:fe:12:d7”
OK
[3353] Connected to WiFi
[10688] Ready (ping: 30ms).
[21173] Got a value: 445
[51412] Ready (ping: 29ms).
[78514] Got a value: 445
[95950] Ready (ping: 28ms).
[119963] Got a value: 445
[135669] Buffer overflow
[135678] Buffer overflow
[135687] Buffer overflow
[135697] Buffer overflow
[135713] Buffer overflow
[135740] Buffer overflow
[135768] Buffer overflow
[135794] Buffer overflow
[135821] Buffer overflow
[135848] Buffer overflow
[135875] Buffer overflow
[135903] Buffer overflow
[135929] Buffer overflow
[135956] Buffer overflow
[135984] Buffer overflow
[136010] Buffer overflow
[136039] Buffer overflow
[136065] Buffer overflow
[136091] Buffer overflow
[136119] Buffer overflow
[136145] Buffer overflow
[136173] Buffer overflow
[136200] Buffer overflow
[136226] Buffer overflow
[136254] Buffer overflow
[136281] Buffer overflow
[136308] Buffer overflow
[136335] Buffer overflow
[136363] Buffer overflow
[136389] Buffer overflow
[136416] Buffer overflow
[136443] Buffer overflow
[136470] Buffer overflow
[136498] Buffer overflow
[136524] Buffer overflow
[136954] Buffer overflow
[136962] Buffer overflow
[136962] Buffer overflow
[136972] Buffer overflow
[136998] Buffer overflow
[137025] Buffer overflow
[137053] Buffer overflow
[137080] Buffer overflow
[137107] Buffer overflow
[137136] Buffer overflow
[137160] Buffer overflow
[137188] Buffer overflow
[137214] Buffer overflow
[137242] Buffer overflow
[137269] Buffer overflow
[137295] Buffer overflow
[137323] Buffer overflow
[137350] Buffer overflow
[137851] Buffer overflow
[137861] Buffer overflow
[137864] Buffer overflow
[137869] Buffer overflow
[137895] Buffer overflow
[137923] Buffer overflow
[137950] Buffer overflow
[137977] Buffer overflow
[138004] Buffer overflow
[138075] Buffer overflow
[138084] Buffer overflow
[138085] Buffer overflow
[138113] Buffer overflow
[138139] Buffer overflow
[138166] Buffer overflow
[138193] Buffer overflow
[138220] Buffer overflow
[138248] Buffer overflow
[138869] Buffer overflow
[138878] Buffer overflow
[138883] Buffer overflow
[138888] Buffer overflow
[138914] Buffer overflow
[138941] Buffer overflow
[138969] Buffer overflow
[138995] Buffer overflow
[139023] Buffer overflow
[139125] Buffer overflow
[139133] Buffer overflow
[139137] Buffer overflow
[139142] Buffer overflow
[139168] Buffer overflow
[139196] Buffer overflow
[139223] Buffer overflow
[139250] Buffer overflow
[139277] Buffer overflow
[139853] Buffer overflow
[139863] Buffer overflow
[139866] Buffer overflow
[139871] Buffer overflow
[139897] Buffer overflow
[139925] Buffer overflow
[139952] Buffer overflow
[139978] Buffer overflow
[140006] Buffer overflow
[140048] Buffer overflow
[140060] Buffer overflow
[140087] Buffer overflow
[140113] Buffer overflow
[140141] Buffer overflow
[140168] Buffer overflow
[140195] Buffer overflow
[140222] Buffer overflow
[140249] Buffer overflow
[140891] Buffer overflow
[140900] Buffer overflow
[140903] Buffer overflow
[140908] Buffer overflow
[140935] Buffer overflow
[140962] Buffer overflow
[140989] Buffer overflow
[141017] Buffer overflow
[141043] Buffer overflow
[141082] Buffer overflow
[141097] Buffer overflow
[141124] Buffer overflow
[141152] Buffer overflow
[141178] Buffer overflow
[141206] Buffer overflow
[141233] Buffer overflow
[141259] Buffer overflow
[141287] Buffer overflow
[141860] Buffer overflow
[141871] Buffer overflow
[141874] Buffer overflow
[141879] Buffer overflow
[141905] Buffer overflow
[141932] Buffer overflow
[141960] Buffer overflow
[141986] Buffer overflow
[142014] Buffer overflow
[152827] Ready (ping: 28ms).
[168807] Got a value: 748
[169731] Got a value: 1023
[200306] Ready (ping: 30ms).