Same, friend and I were doing a three mask run on alts, got kicked out without even seeing the treasure room, we were both low on health at the time and thought that we just died, Bought another vessel and tried again, we were about halfway through and all of a sudden we were back in the Chamber of Heart with once again no reward. Later got mailed the memontos and echos of Ny’alotha, but we did not receive the quest items for the objectives that we completed. Opened ticket to have Blizzard tell me…
We are receiving a lot of reports about this issue. However, at this time, we are not assisting with restoring horrific vessels as a result of this incident. The reason for this is because coalescing visions are pretty easy to get and there is no cap on them, so you can purchase a new vessel.
On an alt, losing two vessels is losing two ranks of the cloak. Yes, there is no cap on the visions, but there is a cap on how many you can get per day. But in the end; “…you can purchase a new vessel.”