Azure App Service Intermittent Endpoint Connection Failure via RestSharp

Question

I seeking your input, if not, help in solving this issue which has creeped up recently.

I have an Azure App Service running on Windows+.NET Core 5 which also houses a few WebJobs. These Webjobs do some processes for such it uses RestSharp ver. 106 to an endpoint service that uses Digest Authentication.

Quite recently onwards, I am finding that most of Webjobs are returning the following Error:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host failed to respond.

I am clueless as to where to begin. Some previous posts cited that the reason to get such errors is limitations in the Host Server (Which apparently is a third-party source). I have consulted the Third Party source, and they confirmed that there aren't any limitations placed at their end and all of their services are working fine.

I am unaware if there is any limitations for Outward calls in Azure App Service.

I have placed retries, but it proves to be 50-50.