The forwaders on my account seem to have stopped working. Nothing was changed from when it did work a few days ago. I sent a few test emails and after a day, they still did not arrive at my main account nor at my CPanel account.

I have been waiting for a few emails - I hope they were not lost completely?

Let's re-setup the forwarders:
Login to your cpanel > Mail > Forwarders

Due to common and frequent glitches in cpanel/linux, sometimes you must reset mail passwords and forwarders. Not too common.

Is your server shared or dedicated? Reseller?

They seem to work now. I guess it was just some downtime when that happened or something. Kinda strange though.