That’s unexpected.270 is too hot.
What are you using for a heated bed temp? ASA is even worse than ABS- need around 110C for good adhesion. I also needed hairspray on textured PEI to get a satisfactory result. I gave up trying ASA for the time being because of my own attempts to print it.
Yes, you’ll want to get this right before you get too serious about printing functional parts with ASA.
250 sounds better to me.
Double check you heated bed temps, maybe even try a test at temps from 100C to 120C.
You also need soak time. I had to leave the bed at 110C for about 5 minutes minimum (sensor is on the bottom, but you print on the top) It takes a while for thermal soak to get the print bed surface to a good working temp.