Tomb Island

Does a cutscene appear when you interact with the obelisk? If so, you need to follow its instructions and complete the final battle for the artifact. The three tombs on the island are for an optional quest; visiting them is not required.

No, there was no cutscene. In fact, I was really looking forward to interacting with this obelisk, but when I got there, it said "Already visited." I was very surprised, but I decided that I could do without the Tear (at that time, I hadn't read the forum and didn't understand where to find the artifact - maybe it's somewhere on the islands?) and started exploring the tombs, which, as it turned out, I had already visited.
I don't think this bug can be easily reproduced, but if anything, I was playing as the Necropolis.