eCPPT Exam Environment Issue

Anyone here who took eCPPT exam last week and currently taking the exam, experiencing weird issue with the exam environment? I was able to root 4 boxes, but all of a sudden, I got disconnected, and when I tried to connect back to the machines to continue working, the exploits I used are not working anymore. I tried 3 different VMs (2-Kali and 1 Parrot OS) to see if the issue is on the VM I am using, but still getting the same issue.