snmpbulkwalk times out

[murrant]

But snmpwalk is successful.
snmpsim 0.4.7
pysnmp 4.4.12
pyasn1 0.4.8

From snmprec here: https://github.com/librenms/librenms/blob/master/tests/snmpsim/vrp_ac6605-26.snmprec

Running snmpbulkwalk -M mibs -v2c -c vrp_ac6605-26 udp:127.1.6.1:1161 Q-BRIDGE-MIB::dot1qVlanCurrentUntaggedPorts against the test data times out. Where as snmpwalk is successful.

Watching the log it seems like it slowly returns some of the data, but it never finishes. I tried increasing the timeout to an extreme amount but it still timed out.