There is no try_udev_device line in your debug log for laplv, this implies that LVM has not set this device up and the underlying devmapper devices have not been created and/or announced by the kernel/udev
There is no try_udev_device line in your debug log for laplv, this implies that LVM has not set this device up and the underlying devmapper devices have not been created and/or announced by the kernel/udev