All Busy Mode for SIP Forking and dial_extension api don't work together

When "All Busy Mode for SIP Forking " is enabled internal call's with the API dial_extension are directly to voicemail directly.

I think because the callee "initiates" the first contact with the caller and therefor is marked as busy. So when the caller answers the call the call to the callee will be initiated but the calllee is still marked busy

Yeastar S100 firmware 30.10.0.51