Based on your description, firstly, I need to clarify two things:
- If possible, do not add servers whose versions are different from those of your original ones. That is to say, install server 2016 instead of 2019. Different server versions may cause problems when you put them into the same cluster.
2) If your storage configuration has been the same one since you initially built up your cluster, I think your issue is not related with Refs/Ntfs modes.
Since your issue cooured when you set these two VLANs to traverse the aggregated connection, I think your issue may be caused by network configuration, such as NIC settings. Even if you can ping among these servers, you can still encounter NIC issues. Do you have any other warning reports of your validation? If so, do you have any NIC-related error/critical or warning reports within your validation?
Besides, you can go to system event to check if there are any relevant logs during your vlan setting and cluster validation: %SystemRoot%\System32\winevt.
Thanks for your support!
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