Bambu Studio - Support Blocker not blocking supports?!

Hey,

I'm trying to get Bambu studio to block supports, but it keeps creating them regardless.

Can anyone advise what I'm doing wrong? You can see the support blocker object covering the entire object below, but it's still generating supports?!

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https://preview.redd.it/s8a67buuhg9c1.jpg?width=819&format=pjpg&auto=webp&s=084ce6f506812d700ba374d9a017359a116bdbbc

https://preview.redd.it/6z31lduuhg9c1.jpg?width=707&format=pjpg&auto=webp&s=582f3caccdc17e8836a9129866d576a8ca5dbeb3