At startup, we log the diagnostics [as a single entry](https://github.com/Particular/NServiceBus.AzureFunctions.InProcess.ServiceBus/blob/master/src/NServiceBus.AzureFunctions.InProcess.ServiceBus/ServiceBusTriggeredEndpointConfiguration.cs#L128). App Insights has [a limit of 32768 characters](https://docs.microsoft.com/en-us/azure/azure-monitor/app/data-model-trace-telemetry) so the diagnostics can get truncated. Consider logging the diagnostics line by line or section by section.