welcome back to the Polycom Community.
The CMA you are using is running the original GA release v5.5.0 ER019.
Since then various software updates have been released.
I suggest you check against the latest 5.5.0 Patch 5 release notes and consider upgrading your Infrastructure to a supportable version and if the issue still occurs work with your Polycom reseller.
EDIT: 5.5.0 Patch 5 Release notes
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