Toggleable columns not working with Split

I am trying to use a Split layout to shrink the user's avatar column just like the example in the docs (attached), but once I implement the Split then ->toggleable no longer works.

1) Is this expected behaviour, or an issue?
2) Is there a way to accomplish the same as ->grow(false) without using Split?

Thanks!
Screenshot_2023-08-20_at_9.50.11_PM.png
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