Bug ID 542586: Fallback alert mechanism can result in page refresh in Internet Explorer 8

Last Modified: Aug 19, 2026

Affected Product(s):
BIG-IP FPS(all modules)

Known Affected Versions:
11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4

Fixed In:
12.1.0, 11.6.1

Opened: Aug 31, 2015

Severity: 3-Major

Symptoms

If browser sent alerts fail to be received, secondary sending mechanisms may cause page to refresh in browser.

Impact

HTML page refreshes in browser

Conditions

Internet explorer 8 or older. HTML page with websafe enabled. HTML page contains a form. Alert sent. Alert receives failed response.

Workaround

None.

Fix Information

Fallback alert mechanism no longer results in page refresh in older browsers.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips