Backlog Ixalan's binding does not work

[monsyama]

（Ixalan's Binding] exiled [Fires of Invention] under the effect of [Ixalan's Binding].
The opponent cast 【Fires of Invention】.
It should not be possible to cast it.
Please improve.

 

[Wizzerinus]

exiles the permanent but my opponent can still cast spells with the same name. I think this also applies to Ashiok's Erasure. game 859363786