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
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
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