Have a bunch of rules (69) configured, most of them work just fine. However, the latest rule does not get registered in the log nor does it trigger when required.

Logging is active on Information level. This way there should be a log entry whenever you change a rule configuration, and that is the case for the working rules.
Nothing is recorded on the latest rule. It has one error related to the use of {.} (self) in a property setter, but that should be OK even though it is annoying.
Other than that I cannot see what might be wrong and why changes are not logged.
The trigger does not work either. It could be misconfigured, but I have checked it over and over again and compared it to working rules. Cannot see anything wrong.

Is there a limit to how many rules one can configure in one module (like a max size of the JSON configuration file)?
If not, what else might be wrong?

{
    "Name": "Håndværkerliste find sag, ny",
    "ConfigurationMode": "Advanced",
    "Trigger": "ObjectEnteredState",
    "CopyMode": "OnSourceObject",
    "Source": {
        "ObjType": "{53F0C8FD-0BF0-47C4-8FA6-4C2D0DADB650}",
        "Class": "CL.IndkbsordrerAab",
        "Workflow": "WF.IndkbsordrerAbb",
        "State": "WFS.IndkbsordrerAab.B1bTilfjSagArtesa",
        "SearchConditionFilters": [
            {
                "SearchConditions": [
                    {
                        "conditionType": "equal",
                        "expression": {
                            "type": "propertyValue",
                            "propertyDef": "PD.SagArtesa",
                            "indirectionLevels": []
                        },
                        "typedValue": {
                            "dataType": "lookup",
                            "value": {
                                "isNull": true
                            }
                        }
                    }
                ]
            }
        ]
    },
    "VaultSearchFilters": [
        {
            "StatusFieldConditions": [
                {
                    "Field": "Type",
                    "ValueType": "Static",
                    "ObjectTypeValue": "OT.SagArtesa"
                }
            ],
            "Conditions": [
                {
                    "Property": "PD.Leveringsoplysninger",
                    "Operator": "MFConditionTypeContains",
                    "Value": {
                        "Mode": "Dynamic",
                        "DynamicValue": "%PROPERTY_{PD.Lejeml}%"
                    }
                }
            ]
        }
    ],
    "Properties": [
        {
            "Property": "PD.SagArtesa",
            "ValueFrom": "VaultSearch",
            "Value": {
                "Mode": "Dynamic",
                "DynamicValue": "%.%"
            },
            "Additional": true,
            "Update": "OnlyWhenTargetEmpty"
        }
    ],
    "PropertyErrorHandlingBehaviour": "Continue",
    "ErrorHandlingBehaviour": "Continue",
    "Description": "Der kommer en fejlmelding vedr. placeholder {.} i /Properties/0/Value/DynamicValue. \nDen skal blot ignoreres. Det virker, som det er!"
}