Hi @timmse @itchycode there were changes made in 8.5 which I believe caused these issues with the notices. There were many other issues across other themes so Woo have decided to roll back these changes for version 8.6 so the notices are not not being styled correctly again as the markup has changed from 8.5 → 8.6
With WooCommerce 8.5, we rolled out block notice templates for all themes. We then realised that this lead to customisations no longer working. With WooCommerce 8.6, we’re rolling back this change
More info
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BLOG - WooCommerce 8.6: Product Blocks & Order Attribution Updates - Woo Developer Blog
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BLOG - Tutorial: Overriding notice templates - Woo Developer Blog
I am building using 8.6 and my notices are not being styled at all due to the above.
EDIT → quick note to say that if you rollback to 8.5.x then the notices will be styled then once Bricks updates/rollbacks to the 8.6 markup you can then update to woo 8.6 and everything should work correctly again