Hi guys,
Just a quick update:
I am keeping an eye on this thread to know what’s up with the box. I’ve read that a lot of people are experiencing that the privesc part is unstable. After a couple of checks I did locally I can confirm that that’s the case. This is something we did test thoroughly though, but after the testing procedure we made a small mistake which resulted in the privesc part being unstable. I’ve messaged a moderator on HTB and we’re working on a fix.
Sadly I’m not able to remove the experience from people who already rooted the machine, but to all of you who did own the box pre-patched; consider yourself a go-getter 
Thanks for your feedback.