Depending on conditions, you have this loop running every second, and depending on how long the if-loop actually takes, this could be your timeout issue.
You have print statements, so you should be able to determine if that single long if-loop or the group of nested if-loops is the culprit.
Either way it is a code and timing issue, not a Blynk bug.
PS after posting code, please format it accordingly, as per the Welcome Topic and here…