Grid is too persistent

[Amias-Burrows]

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Describe the bug
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When I set grid on an element within a class and then change to flex at a smaller breakpoint it doesn't take effect. Upon inspecting the site I see that grid has been set as display: grid !important which doesn't make sense. The issue has been displayed in the sandbox link. Adding display: flex !important; doesn't work in my scenario as it's a section block which has the grid set on the inner element where the flex !important is set on the block itself.

A link to a Sandbox site where the bug has been reproduced https://oxygenbuilder.com/try? (REQUIRED)
https://oxygen-qvfpbrlt673zl.oxygen-demo.qsandbox.org/wp-admin/post.php?post=20&action=edit
Access Code: 6377
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