Here's the implementation

Can I see where you're calling the server action from?

Here its a client component

What is happening exactly is, it works the first time, but then I doesn't, I think it might somehow be caching the action, so it doesn't run again

thus returning a 303, idk tho just guessing really

Also important to mention that I am using turbopack, altought I don't think it really applies here

It seems like you're first screenshot was deleted, but just a hunch, maybe the error comes from the fact that you're generating the action dynamically with a factory method?

Maybe that's why you get a 303 error, because Next can't track the specific action you're referring to?