Questions regarding cart farmer!

Hey! I have been using the CF250 for about 2 months now! All has been great it’s been very reliable & efficient.
Over the past 2 days I’m having a ton of issues and haven’t been able to get any work done.

The oil won’t load into the syringe, just air bubbles / it seems like something is stuck in its path.
I have dissembled & cleaned everythjng but still can’t get it to fill the syringe .

Maybe I need new seals or something? It’s beeen a lot of trial and error, hoping it’s a quick fix that I’m just overlooking. Let me know if any ideas!!

Also I make sure the oil is at the perfect consistency before putting in, it shouldn’t be too viscous / thick. Also why I’m puzzled by this.

I’m attaching a video of what’s going on.