no Stringing, but Starting Blob

Hi guys, I'm fairly new in 3D print.
Just bought a used Kossel Delta and really happy.
It working fine and I'm learning the bases of calibration.

I got good success to get rid of Stringing with retraction settings, yeee :)
But I have a "starting blob" on the inclined tube, it's when the nozzle arrived to start doing its layer, not the exit.

Any advice that can prevent this "too earlier start blob" ?
Thx

Attachment 10386

Cylinder are 20mm height
Inclined one is around 30° angled
PLA
bed 70°C
nozzle 200°C
E3D 0.40mm
layer precision 0.13mm
don't have the speed here, but it was medium, not slow, not fast.