Hey, glad it worked out for ya

I'm not sure I'd say that you did anything wrong

I would check a couple of things.

First check the disconnector for any damage/burrs/excessive wear, particularly along the outside edge.

Then push the disconnector down and release it several times, check that it returns to full height each time without hesitation. Do this with trigger released and with it held back.




Also check this area of the slide for any damage/burrs/etc. that might impede the disconnector:


Finding nothing untoward, I'd put a little lube on the disconnector and give it a good work out at the range.

Regards,
Greg

BTW, welcome to the forums