Looks like there might be problem with N-S connectivity of Tier0 of Cluster B, you can try following

Please check in firewall ICMP traffic is allowed or temporarily disable all firewall rules

Ping from VM to default gateway of segment in cluster B ideally this should work, if not
it is recommended to validate required vlans are allowed in switch UCS port channel etc.

Next ping from NSX Edge tier0 to HA VIP and switch IP
Based on results you can further narrow down issue