BugZero | F5 BugID 440346 - Monitors removed from a pool after sync operation

F5 - Defect ID: 440346

Monitors removed from a pool after sync operation

F5 - Defect ID: 440346

Monitors removed from a pool after sync operation

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: TMOS

Description

Symptoms

Monitors might be removed from a pool after sync operation.

Impact

Monitors might be removed from a pool on the devices that received a sync.

Conditions

If devices are in a failover device group, and this group contains a pool with multiple health monitors enabled, then using the 'Overwrite Configuration' option.

Workaround

None

Fix Information

Monitors are no longer removed from a pool on the devices that received a sync.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 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, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed versions: 12.0.0, 11.5.2

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.0.0, 11.5.2

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F5 - Defect ID: 440346

Monitors removed from a pool after sync operation

F5 - Defect ID: 440346

Monitors removed from a pool after sync operation

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 440346

Monitors removed from a pool after sync operation

F5 - Defect ID: 440346

Monitors removed from a pool after sync operation

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium