How do I make buckwheat pancakes without non-stick cookware?
"For a few seconds", if literal, is the problem.  You want to make sure that the pan is well heated before adding your batter.

My mom's test was to sprinkle some water on the pan, and see if the droplets danced around.  Leidenfrost effect.

As you're using quite a bit of oil, you can also look for the shimmering that will happen just before the oil starts to smoke as an indication of a well-heated pan.