Why does timeline have extra numbers

Not a big deal, mostly I’m just curious. In the attached why are there extra numbers only on bar 10. I’m changing from 2/4 to 6/8 at that point. I assume that’s the cause, but what’s the purpose & can it be turned off?
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Hi,

This is caused by the internal algorithm which decides when to display the lower grid numbers. This is individual for every single bar, and the Signature change affects it (because you have different count of beats in the bar).