o3-mini not returning reasoning tokens

Hi,

I work on a service that leverages o3-mini via Microsoft Foundry. In the past few days, I've observed that when calling o3-mini via Microsoft Foundry, that completion_token_details always has the reasoning_tokens value set to 0, regardless of the reasoning setting being used.

In my testing, it seems that the reasoning is still occurring, as increasing reasoning value causes the completion_tokens field to increase by a good amount, but none of the reasoning levels cause the reasoning_tokens value to be anything other than 0.

Has anyone else encountered this issue?

Thanks!

Tom