Machines been working well generally, only major issue is random VFD drop-outs with an error code that indicates a short in the motor windings?

Its not done that much work really, i cant believe the spindle is dying already?

The MAJOR issue with this issue is that i haven't wired the VFD fault signal into Mach3 yet so the spindle cuts out and *ping* goes another cutter :(

I need to drag the diagrams out and figure a way to get the fault into Mach, at least that will save my cutters, but surely not the spindle already - this was from Aliexpress, any warranty do you think??

Is there a "good" spindle to replace it with?