In the custom card creation, the mega planeswalker does not show starting loyalty (it just shows a black loyalty box). But if you click on the card, the text version of the card shows the starting loyalty.
Custom Cards - Tall Planeswalkers missing starting loyalty
Fixed.
A recent change has color options for the PT box (white text for borderless, etc), and I accidentally set Planeswalker's to Black. So your 2 was there, it was just black-on-black. Oops.
To the beaten, the broken, or the damned; the lost, and the wayward: wherever I may be, you will have a home.