MAC address exist but unable to resolve it on ARP?

Hi, I would like to ask? What is the reason why im able to learn the mac address from the interface but unable to resolve it on ARP?

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Topology:

1.1.1.1/30 SW(SVI 10) ---------TRUNK-------RTR(sub int 10). 1.1.1.2/30

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SW# show mac address dynamic vlan 10

aaaa.aaaa.aaaa (SVI)

bbbb.bbbb.bbbb(from Trunk link)

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SW#show arp vlan 10

Protocol Address Age (min) Hardware Addr Type Interface

Internet 1.1.1.1 - aaaa.aaaa.aaa ARPA Vlan10

Internet 1.1.1.2 0 Incomplete ARPA

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Thank you

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