Same issue repeating itself on the lab

Randomly disconnected during a loading screen after the second trial today. Turns out I look for information and it seems this is a long lasting problem

https://fr.pathofexile.com/forum/view-thread/1709720/page/2

No, is not my PC which runs smoothly in many games far more demanding than PoE.
No, is not my network with stable 12ms.