At some point when going through an ocean monument I lost my water_vision, I think it was before I killed my first elder guardian. Perhaps this was due to the mining debuff being added and expiring multiple times.

Restarting the game does not fix the issue. I have not tried killing my character, though I suspect that might fix the issue. I don't want to loose my experience.

Water Vision can be toggled with the active ability key, so it may have gotten disabled.

Yep, that was this issue. thanks