Since taking 0.5.2 I find the direct access pins on the Arduino go high on reboot

[Toro_Blanco]

Try adding this to your sketch.

#define BLYNK_NO_BUILTIN 

Here is a topic that discuses an issue similar to yours.
https://community.blynk.cc/t/advanced-warning-next-library-update-will-send-esp-pins-low-on-bootup/21048