Runic Splinter / Uthred instance crash

Heyo, I ran 3 times Uthred with my Blood Mage Cast on Critical with Lightning Warp build, I tried to do t1 first obv, worked everything fine, on t2 though, the instance crashed once and I got back to login screen, when I logged back in the portal had disappeared and I thought well, guess I'll just buy another t2 try, it worked again, thought it might just be the server or w/e , on to t3 try, farmed together the 150 splinters, killed him after he spawned (the build obliterates bosses) and when he was about half hp to 2nd phase, the instance crashed again while I was casting Ball Lightning on him, thought nothing again, bought another try since same happened again, no portal, no splinters, all gone w/e again shit happens, did the same, crashed again, third times the charm, right? ... wrong, crashed again... spend all my last currency on it to just get thrown out multiple times :L