Volos not copying shape shifters
The interaction between volos, Guide to Monsters copying shapeshifters that don't stay shapeshifters on the board as in Phyrexian Metamorph is not working.
It feels like the game is still seeing the shapeshifters to have the shapshifter creature type even after they have changed their creature type to the copied creature.
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Rezzahan#77802
commented
Volo triggers for spells cast, not creatures entering the battlefield. And on the stack, your Clone variant is just a shapeshifter (or other subtypes printed on the typeline), it's not copying anything yet. Also, many Clone types retain some or all of their creature types when copying something. Volo's copy will go above the original spell and resolve and enter first.
edit:
Also keep in mind, that Volo also looks at creature cards in your graveyard, where your Clones are just themselves.