Question Strange effect in just one corner?

[Claghorn 1]

I'm trying to get cura dialed in on my old (but newly upgraded) solidoodle. If I print this single wall one bottom layer test cube I use a lot, in RepetierHost with slicr3 it comes out just about perfect. Copying lots of settings from slicr3 to cura, the same print in cura comes out perfect everywhere except one corner (where the bottom layer lines are really short). In that same corner the brim (which works fine in all the other corners) looks like the lines pushed up from the bed. Anyone have any idea what settings could be related to this? The compare.jpg has the slicr3 version on the left and the cura version on the right. The corner.jpg shows the bottom corner where things pushed up.  In case it matters, that corner is the corner where it initially started printing the bottom layer (it was front right on the build plate), the Z seam was the back right corner.

Edited August 31, 2021 by Claghorn
add info about bad corner

[Claghorn 1]

OK, I have no idea what changed, but after fooling with this a lot, my prints are coming out perfect now. Maybe it was just bed level as my big problem.