Hi,
Can you check:
show ethernet-switching interface ae7 detail
show ethernet-switching table | match 00:23:34:8c:5c:c0
Does this relate to the unicast flooding issue as arp is an Eth broadcast frame [dst mac: ff:ff:ff:ff:ff:ff] whereas unknown unicast is unicast [dst mac: ab:cd:ef:xx:xx:xx] but the destination mac address not present in the mac-address table, hence flood all ports.
Cheers,
Ashvin