Bug ID 657502: JS error when leaving page opened for several minutes

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP FPS(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1, 12.1.3

Opened: Apr 08, 2017
Severity: 3-Major


Google Chrome delays JS execution when the tab is not active. Therefore anti-debug module acts as if someone is trying to debug JS code.


Errors in console and JS logic is incorrectly executed.


-- JS runs in hidden tab in Google Chrome. -- Anti-debug functionality is active. -- Page is left open for several minutes.


Identify hidden tab and pause anti-debug functionality.

Fix Information

The system now correctly handles JS code running in a hidden tab and pauses anti-debug check.

Behavior Change