Describe the bug

UnitExists() == true is not a reliable indicator to check if the bosse's energy/cast/... etc can be tracked.
Weakauras currently solely uses UnitExists() to check whether it should display information or not.

There have been a bunch of cases where UnitExists() results to false but the Energy/Cast etc can still be tracked.

To mention a few:

• Immerseus during the submerge phase
• Jaina (the ship bossframes return false on UnitExists check)
• upcoming boss Shriekwing (during phase 2), can't track its energy/casts without code because of UnitExists check

Do you have an error log of what happened?
no error

To Reproduce

Steps to reproduce the behavior:

1. Import https://wago.io/25_3Y5h0U
2. Pull Immserseus boss and make him submerge by depleting his health
3. While submerged, kill blobs that spawn in the corners, each blob will remove a bit of his energy
4. notice how default trigger doesn't pick it up and the coded one does. check chat for proof

Screenshots
https://www.youtube.com/watch?v=qRpiF-cxl1I

Did you try having WeakAuras as the only enabled addon and everything else (especially something like ElvUI) disabled?
not necessary

Which version of WeakAuras are you using?
beta-1

Are you on World of Warcraft Classic or Retail?

• Classic
• Retail
• Shadowlands

Was it working in a previous version? If yes, which was the last good one?
no

Additional Info

A fallback or maybe even exclusive UnitGUID() check would prevent the issue.
according to buds, weakauras uses solely UnitExists():