Azure Batch: Support for Public Ip Prefix

Azure Batch now supports the assignment of public ip at pool creation time. This seems to work for statically created ip.
Although this is a great feature, it is still very cumbersome. I have tried to give it an Public IP Prefix, but it failed with some access rights error:
key":"Reason","value":"The user identity used for this operation does not have the required privelege Microsoft.Network/publicIPAddresses/join/action on the specified resource
I assume , i get this error because Public IP Prefix are not supported, right ?
If this is the case, do you plan to make this available in the future ?. It would be great to be able to use the same Public IP Prefix in different pools, and let Batch to the public ip management.

Thanks & Best Regards
Laurent