RefreshToken missing grant_type?

in Development
Hello,
I am running into an issue with the API saying my refresh calls are missing the grant type. This had been working fine up until about 4/25. This has been working for quite some time up until then. I have reviewed https://developers.lightspeedhq.com/retail/authentication/refresh-token/ and looked in these forums for updates regarding grant_type. Does anyone have any advice/thoughts?
Error:
feign.RetryableException: status 400 reading LightspeedFeign#refreshToken(String,String,String); content:
{"error":"invalid_request","error_description":"The grant type was not specified in the request"}
Request (masked):
Authorization: Bearer XXXXXXXXXXXXXXXXXX
Thank you