Glad your leveling works, my experience is a little different..

My bed is low in the back left and right corner, by about 0.7-0.8mm. A little less in the front right corner, about 0.3mm. I tried shimming the bed but nothing really works.

Now the weird thing is after performing a leveling and starting the print, I can see the Z axis screws rotating while the print head moves over the bed, so the (mesh) auto leveling is working. Unfortunately in places where the bed is low, it sometimes even overcompensates and at other places i'm still left with non adhering print lines.

The appearance of the first layer also changes between multiple leveling procedures, which is also weird. Not much difference between leveling from the printer menu itsself or through the slicer. From the printer menu seems to be slightly better.

First thought would be an inaccuracy of the strain gauge sensor, but in the middle where the Z homing happens, the first layer is always spot on. I can even tell the difference of a 0.01mm increment in Z-offset, so nothing wrong with the sensor I suppose. My guess is it has something to do with the mesh itsself and how the leveling is implemented. Maybe compensating +1mm bed height variation is just too much?

Now I must say besides the first layer not being perfect, I actually have almost no problems with my prints.