I have now upgraded 3 systems to x86 intel 9.2.6 , all of which have the same error after upgrade.
The systems are
Asus Chromebox M004U2GB Intel Celeron 2955U Processor.
Mission Bamboo with Intel Celeron
Intel NUC
All three systems have different models of Bluetooth adapters installed. One BT adapter is USB the other two are on MiniPCI-e cards.
All above systems now throw up occasional bluetooth error when system is idle. I was curious if this is a known bug.
Awfully coincidental that three systems all have the same error and only after updating to latest version.