Lower layer undercut

I am trying to print the 20x20cm calibration cube. Just got my LulzBot Taz 6 put back together after not touching it for a long time.

It looks like something is going on near the bottom of the print. Like the first few layers after the first layer are undercut somehow.

Using brand new polymer PLA

I fiddled with Z offset and it seems t help a little but wondering if I am going down the wrong path. I believe it is at - 1.15 now. Hoping for some guidance on what to tweak next.

Printing at 205 and bed is 60.

Image is of block on its side to get a better view of the defect.