Module mikrotik:error in unmarshalResponse: expected a sequence when unmarshalling a VB, got 2

[matgapa]

Host operating system: output of uname -a

Ubuntu 20.04

snmp_exporter version: output of snmp_exporter -version

snmp_exporter, version 0.22.0

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I have two router mikrotik I want use prometheus with grafana for monitoring panel... I tried with several version 0.17 to 0.25 only worked 0.22 correctly with panel on grafana this no really important only want solve problem with snmp_exporter this running on port 9116 when try use module mikrotik on 1 router this working without problem but another router error

working:
http://xxx.xxx.xxx.xxx:9116/snmp?auth=public_v2&module=mikrotik&target=xxx.xxx.xxx.aaa

show all metrics

not working

http://xxx.xxx.xxx.xxx:9116/snmp?auth=public_v2&module=mikrotik&target=xxx.xxx.xxx.bbb

An error has occurred while serving metrics:

error collecting metric Desc{fqName: "snmp_error", help: "Error scraping target", constLabels: {}, variableLabels: []}: error walking target xxx.xxx.xxx.bbb: error in unmarshalResponse: expected a sequence when unmarshalling a VB, got 25

id use another module "if_mib" show some dates but need use module mikrotik

from shell using snmpwalk all working fine

snmpwalk -v2c -c public xxx.xxx.xxx.aaa

show metrics

snmpwalk -v2c -c public xxx.xxx.xxx.bbb

show metrics