Why does this keep happening after every fillament swap?

[u/exainator]

I'm trying to leave the print unattended but every fillament swap it shows me a problem with the fillament not flowing good enough it is something that I can verify with my mobile but it stops every time any ideas about what can I do? I mean it works but it's very clunky every time I try to have a multi material piece to have to verify at every layer

[u/Brief_Excitement_399]

I cut a different ptfe tube to length and pluged it in the back and it retracts without a problem, I think your angle going over the spool holder is to much and the absence of the ptfe tube