CBT enabled on linked clones at recompose

I've been seeing errors where space reclamation was failing on all my linked clone VMs.  I tracked the problem down to the fact that CBT is enabled on all the linked clone VMs.  However, it is not enabled on the parent VM.  When I recompose from the parent, CBT gets enabled on the linked clone VMs.

Some background:

CBT was enabled at one time on the parent VM, so it does have both the "ctkEnabled" and "scsi0:0.ctkEnabled" rows in the configuration parameters.  But they are both set to "False", which according to VMware 1031873 is how you disable CBT:

To disable CBT:

1. Power off the virtual machine. 
2. Right-click the virtual machine and click Edit Settings. 
3. Click the Options tab. 
4. Click General under the Advanced section and then click Configuration Parameters. The Configuration Parameters dialog opens. 
5. Set the ctkEnabled parameter to false for the corresponding SCSI disk.

I'm thinking this could be a bug, where if the parent VM has the parameter set in the .VMX, it will enable CBT on the linked clones regardless of whether it was set to "False".

View 5.3.0

ESXi 5.5.0

Parent VM: Win7 x64 (HW version 9)