If an injector stays in the head while the rail comes out, you have broken the retaining clip. Stop. You will need to fish the clip out of the bore later.
This means the injectors are seated deep in the cylinder head, sealed by tiny copper washers and held in place by a seemingly innocent little clamp. Over years of heat cycles, combustion by-products, and fuel additives, these injectors don't just sit there—they bond. They become one with the cylinder head. They become geological features. vw 1.2 tsi injector removal