..that you can construct a level 50 backpack. And here I've been waltzing around since conception with a level 20. Just yesterday; BAM! 30 extra carry weight!
Wait until you get that Possum Token Backpack High Capacity Mod :)
Edit: Thank you for your reports. The team are already aware and investigating the issue, but I personally didn't know about it (I haven't done any of the Possum Events since getting the backpack mod). Apologies if my comment came off as uncaring of the issue.