I went to lab yesterday or so, and me, pt leader, another guy again other guy did lag heavy. One of them even had a long lasting dc.
I expierenced a few bugs/glich/issue (on short succesion)
The game crashed a few times when i used Repellent Strike. The Hotkey dissappeared afterwards, and i had to reassign the hotkey to Repellent Strike. This issue happend in lab only. It went ok after i gone out of lab. I have gone through lab sometimes, and mostly i see one or two teammates lagging. After we were done, they were dissappoiinted as they said the lag was in Lab only. I can confirm that myself now. When you are experiencing heavy Lagg, with crashes, DC and many other shit, sometimes you see a msg from the game plop up. "Game version is outdated. Update now?". This Message comes ingame, not before char select screen. Also, a combo of "Your Client is updated. Please wait for server update" and the other one came up a few times. Either way, i got kicked out of the game. This didnt only happen in lab, but sometimes normally also.
*side-note: Before i went lab, i reseted my phone, and also reinstalled the game. Cache update didnt appear then. My device is Motorola Moto G, running CM11.