Hi, I've built 3 cabinets, each has a relay with a 12V coil that switches 230V which feeds into the coil of a contactor.
In one of the cabinets, the relay still works but the contactor has suddenly stopped energizing.

What's strange is that if I push on the contactor (while the relay is on) then it energizes and if I push lightly then it switches rapidly on and off.
It looks like there may be a loose wire to the coil within the contactor itself or maybe the coil has a break in it. I've checked the cabinet wiring and confirmed that's not the cause.

All of these contactors are fairly new and have only been energized for around 24 hours total so I wouldn't expect a fault to develop so quick.
Has anyone seen anything like this before?
Is it possible I just got a faulty one?
Should I be worried about the others breaking?

These are the ones I bought https://www.amazon.co.uk/gp/product/B07GXM2Q3S/
Is it worth replacing all 3 with more expensive ones or is this likely a rare occurrence?