No Linkspeed with Invoke-IcingaCheckNetworkInterface

Good morning,

I have been using the Check Invoke-IcingaCheckNetworkInterface for some time and there, with some (not all) servers, the phenomenon occurs that all performance data is captured, except the LinkSpeed. Do you have any idea what the problem could be?

PSVersion: 5.1
Version of Powershell-Framework: 1.8.0
Version of Powershell-Plugins: 1.8.0