Hey,
Make sure that Node2 have proper connection to the Witness. I would recommend you to run cluster validation and see if your cluster have any issues. https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/jj134244(v=ws.11)
In addition, you can use StarWind VSAN to create replicated LUN, which can be used as a disk witness on your nodes.
https://www.starwindsoftware.com/starwind-virtual-san
Cheers,
Alex Bykovskyi
StarWind Software
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