With respect to reporting bugs, this is a good place to see if anyone has the same problems or a workaround, but the way to let Larian know is via their support website. The Report a Bug link up along the top of the game launcher will take you to the right place.
The cub also caught up with me in the Underdark ...
[spoiler]but in the Grymforge camp in case that makes a difference. The first time, after interacting with the cub, my party continued their long rest afterwards. The second time, the paw-healing one, my party were just left standing after the scene, so I clicked on the bedroll and the long rest was completed (without having to reselect food). I wondered if completing the long rest should have been auto-triggered, and the bug people are seeing might be because the game has got itself into an invalid state of some kind?
[spoiler]
