I would suggest try Option > Return to Factory Settings > Most and see if that makes a difference.

Also, I think the only place you see that the Style has changed is directly below the song title window.

Here is a quick example where I changed the style on bar 5. The first image is the original Style:
[Linked Image - Only viewable when logged in]

Here is the Style showing when the song reaches Bar 5:
[Linked Image - Only viewable when logged in]

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