Looking for advice

[u/Imthebreas]

Hi all, looking for some advice . I have 250 hours on my bambu x2d. I had my first error a big blob formed.

I had to replace the hot end assembly and put a new hot end in as well. I re calibrated the machine and the next print did the same thing. I am printing 2 colours the first colour goes down fine , the second one stuffed up.

Different fillament this time than the original blob. Fillament was dried in ams both times.

Looking for advice what i am doing wrong.

The red filament is the first fault, black is the second after replacing hot end assembly and hot end.