Abyss Shark/Crystal Shark not letting you XYZ summon rank 4 number monsters

[Togder]

1. Bug description
   [Abyss Shark and Crystal Shark won't let me use them to create a rank 4 numbers XYZ monster, in my case, Number 4: Stealth Kragen.]

2. Bug reproduction steps

   [Just get Crystal Shark or Abyss Shark on the field along with any other level 4 water monster and it will not let you XYZ summon with them.]

   Spoiler

   your replay code

3. Screenshot OR error code

4. Expected behavior
   [These two cards should allow to be used as material for rank 3 or 4 XYZ summons.]

5. What OS are you using
   [Windows-10]

[Togder]

It is Stealth Kragen that is bugged, it isn’t being recognized as a Number.

[Lyris]

Try this again