I got a Strange snapshot callled 20w14infinte

I Opend Minecraft and i found a new snapshot called 20w14Infinte so i loaded it up and when i look in my single player worlds they where all gone, but when I wen't to 20w13b all my worlds where there I'm confused and when i look in patch notes there where none for snapshot 20w14infinte 

 

Screenshot of 20w14Infinte in snapshot section below

and a Screenshot of the Snapshot patch note section below

-theres no 20w14Infinte patch notes