Hangfire server crashes then restarts itself when processing a job

I am running the Background Job Server on Azure App Service, and when the worker picks up a job, the application restarts itself.

This is driving me nuts, because no error thrown, but the background job server just restarts itself.

Hosting on Azure App Service using Azure Redis Cache
.NET Framework v4.7
64-bit Environment

Hangfire.Core 1.6.15
Hangfire.Pro 2.0.1
Hangfire.Pro.Redis 2.1.1