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Little late to the game on this one, but I just came across the same issue and made it work using the following:
monitor capture buffer interface G1/0/22 both
monitor capture PCAP match ipv4 protocol tcp any any
monitor capture PCAP file location f...
This has been fixed in 3.4:
https://software.cisco.com/download/release.html?mdfid=286317405&catid=268439477&softwareid=284272932&release=3.4.0&relind=AVAILABLE&rellifecycle=&reltype=latest
SNMPv3 AES 256 connectivity issues are fixed in 3.4:
https://software.cisco.com/download/release.html?mdfid=286317405&catid=268439477&softwareid=284272932&release=3.4.0&relind=AVAILABLE&rellifecycle=&reltype=latest
This has been fixed in 3.4:
https://software.cisco.com/download/release.html?mdfid=286317405&catid=268439477&softwareid=284272932&release=3.4.0&relind=AVAILABLE&rellifecycle=&reltype=latest