Hey all!

Im brand new to these forums so apologies if I am posting this in the wrong section (i couldn't find one to suit my needs).

So recently I have been running into problems where my prints are having a stop/start effect when printing in large flat areas as can be seen by the pictures below:


It doesn't do this on the walls, and only appears to do it on the first 4 layers before any infill and the final layers are always absolutely fine. I can't seem to get my head around it because every other part of the prints are coming out perfect, I have cleaned my nozzle which appears to have made no difference... Does anybody have any ideas what could be causing this or has anybody seen this before?

I have searched and searched, but all I can find is people that have zebra stripes going vertically up the build where their hotend is skipping a step on each z level.