blue axolotl seems like green axolotl

Actually, I’m not really sure how I got this bug.

I was happy because I got blue axolotl finally. So I took some screenshots and videos for celebrate myself. but when I rejoin minecraft, It’s resource has changed to green axolotl. (It was occured only to blue adult axolotl)

I'm not entirely sure, but if I were to give you my guess, It looks like the resource pack is the cause.

I was watching a blue axolotl with the 'actions&stuff' resource pack applied. After few minutes, I exited the game and removed the resource pack. And when I back in, that bug occurred.

I’m sry for my bad English.

I wish my writing was helpful