BoneMenu breaks entirely when a menu has more than 9 elements

[FirEmerald]

Store: Steam
Headset: Valve Index

The issue is really that simple. If any bonemenu has more than 9 elements in it, and you navigate into it, the entire bonemenu system breaks - no menu elements will display regardless of what you do, even if you exit all the way out of bonemenu into preferences and try to go back into the bonemenu.
Latest.log

[FirEmerald]

As an aside, forcing the maxElements of the page to 9, causing additional elements to be pushed onto a new subpage, does work, though I've discovered another bug, documented as #71