Default skins are being applied to cracked players with skin

[Alexre]

What behaviour is observed:

Users with a skin previously changed via /skin have now default-skins applied.

What behaviour is expected:

I recently aded default skins for players with no skin, but some players that already had a skin set with /skin (they are cracked) had their skins changed to the default one.

Steps/models to reproduce:

Plugin list:

Environment description

Bungeecord

Plugin version:

Latest dev from build server

Error Log:

Hastebin / Gist link of the error (if any)

Configuration:

Hastebin / Gist link of your config.yml file
https://hastebin.com/agidexijip.makefile