Last Modified: Nov 07, 2022
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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
Opened: Mar 09, 2017
Related Article: K53010710
When PBD and FP are both enabled, there is a very high client-side latency, especially on Microsoft Internet Explorer version 11 (IE11). On IE11, sometimes the challenge remains on a blank page, never moving on to the site from the back-end server.
Delay or blank page when clients access the page using IE11.
This issue occurs when the following conditions are met: -- Your BIG-IP system has Proactive Bot Defense and fingerprinting enabled. -- The client is using IEll. Note: IE11 is known to be affected by this issue. However, other browsers may also be affected.