Unable to advance to further stages of the Kulemak Boss Fight.

Description:
After beating the Kulemak Boss Thrice, I am unable to select any of statues to advance to the final confrontation.

Repro Rate:
3/3 Attempts at the invitation resulted in this event not properly advancing.

Steps to Reproduce:
- Acquire an Invitation.
- Head to the Well of Soul.
- Jump into the Well of Soul.
- Present the Invitation.
- Defeat Kulemak once.
- Pick any statue.
- Defeat Kulemak at second time.
- Pick any statue.
- Defeat Kulemak a third time.
- Attempt to pick a statue.

Expected Result:
A statue can be selected, transitioning the boss fight to its final phase.

Actual Result:
All statue cannot be selected. The event cannot progress.

Impact:
Additional reward and the ascendency cannot be attained.

Note:
I died at least once during all of these attempts at clearing the boss.
The boss health bar was no longer present after respawning.

If anyone is aware of a workaround for this issue, could you please let me know? I have been meaning to switch to the Abyssal Lich ascendency and this problem as already cost me 3 invitations.

Additional Information:
Online videos show a CTA "Return the Finger" present, however after my final completion of the boss fight, this is not present for me.

Confirming this issue still occur after the latest hotfix patch.

I have found a workaround to reach the final phase and ascend as an Abyssal Lich.

For the "Return the Finger" button to appear, one must not die during any of the previous phases of the boss fight. This issue is likely related to other UI element, like the boss HP bar not appearing after respawn.

Once you have reached the final phase, dying no longer blocks the player. The boss HP bar will be missing on respawn but it can be eliminated, drops loot, and Lich player can ascend to Abyssal Lich.

but the boss gets invisible in phase 3 for me and its hard killing him like that. please fix this