There is a reason for that: Performance. Always rendering all levels of a deeply nested object might result in either your server or your browser to run out of resources and fail. That's why there is a maximum number of levels to show. It's usually at
If you need to inspect something that is nested further below, the best thing to do is to limit the
dpm() to a more explicit part of the nested variable. But sometimes you can't or don't want to do that. In those cases, you can increase the maximum levels by placing
kint_require(); \Kint::$maxLevels = 8;
somewhere above your
$maxLevels is of course the maximum number of levels you want to see. If you know what you're doing, you could even use
\Kint::$maxLevels = 0;
to remove the limit entirely. Use at your own risk.