We have done some troubleshooting and have found the problem.
The rule is setup so it matches OID via regexp but after updating to 2.0 its seems that checkmk for whatever reason adds b’ so the regexp doesnt match anymore.
For example this one.
It adds b’ before community and timestamp
Uptime: 147 d, 1.3.6.1.6.3.18.1.3.0: 10.145.37.141, 1.3.6.1.6.3.18.1.4.0: b’public’, 1.3.6.1.6.3.1.1.4.3.0: 1.3.6.1.4.1.14867.1.1.2.1, 1.3.6.1.4.1.14867.1.1.2.2.1: b’257741’, 1.3.6.1.4.1.14867.1.1.2.2.2: b’Mon Oct 25 10:18:01 2021’,
Is this a bug?