Strange gaps and bumbs in solid infill layers

[typetetris]

Hi all!

I have strange gaps and bumps in my solid infill layers (second, third bottom layer or top layers - not the visible last one, strangely -),
trying to print PLA.

Printer: Voron V2.4
Printhead: DragonBurner
Extruder: Galileo 2 Standalone
Hotend: Phaetus Dragon HF
Voron Tap
Hotend-Temperature: 220°C

Maybe someone recognises the pattern and can give some suggestions?
I will try printing a heat tower next thing when the printer is free for it.

Thanks in advance for any pointers.

 

[claudermilk]

220 is pretty hot for PLA. I used to run that hot, now I run 200-210. Other thoughts would be slowing it down a bit and looking at EM or flow.