I found someone having a similar issue. - https://datatables.net/forums/discussion/72218
I have updated to the latest CDN and I am still seeing the formatting as illustrated in the thread.
This example doesn't have the extra white space. Can you provide a link to your page or a test case replicating the issue?
Are you using a styling framework? The thread you linked to indicates the OP was using Bootstrap 4.
I too am using Bootstrap 4
Im not sure what I did last night, but now I have the opposite problem.
The window below my visibility buttons is too short.
see my fiddle.
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