Terraform and Azure - ClientIpAddressNotAuthorized in several modules

Hi All, we use TF Cloud for a large azure environment - in several modules (ie azurerm_synapse_role_assignment) we get the error:

Failure responding to request: StatusCode=403 – Original Error: autorest/azure: Service returned an error. Status=403 Code=“ClientIpAddressNotAuthorized” Message=“Client Ip address : 3.139.233.20”

i tried to search this ip in the TF IP Address Ranges API but does not find any information about this address.

Does anybody have information about this address, does this change from time to time?
If this address changes from time to time, can i resolve this error with the Terraform Cloud Agent?

(using TF v1.0.1 and azurerm 2.66)

thanks for help in advance,
Markus