Describe the bug
The weakaura actually works. However it will only work once I do /wa ingame to open weakauras, then it stays open until I log out.

Do you have an error log of what happened?
No errors that I can see
To Reproduce

1. Go to 'Trigger'
2. Type>Status>Unit Characteristics>Pet
3. OR: Type>Custom>Status>Event(s)> UNIT_MODEL_CHANGED:pet UNIT_PET
   Custom Trigger
   --trigger
   function()
   return UnitExists("pet")
   end
4. OR: Status>Health>Pet>Health% <=100
5. Made sure to load if player class hunter, but still wont work under any load condition when game is logged into.
   All of these triggers and load conditions work after I type /wa and close it.

Screenshots
https://imgur.com/a/waM2xnM

Did you try having WeakAuras as the only enabled addon and everything else (especially something like ElvUI) disabled?
Dont use ELV UI but can start disabling addons as a test if need be.

Which version of WeakAuras are you using?
2.13.1

Was it working in a previous version? If yes, which was the last good one?
I created the weakaura in this version.

Additional context

!nwvqZPoom4FrTVKa0wMz3duMWwMPnLPoDpShm1K4K4Pb78SDOTCO)2Fs2Xqwo1zymczzPpPpjbnMMtj7PKs8dkQk5TRnVkfw69uYoLUKRVNv8EPw1rj33koEKPl)(TCLQ1kavSobDh8vVTrPFUZkusd4jlL81ZvvgULMnfUwwaxVrjKWfVS(FEieRTFsxD1TrZNeFZ8PXtIJUBwYCA1vZIdrFPQvPbpMf7(K4oN4oNsZIUEgglwriWeJLPTEeujKctJxwGPekbYwTOUMRnEVMFsbk2XTMoEbEbP3W32dVtyWtmnB5hamR64AMfqf5V(7ZwHfmuMTZO07EcYUGMGpbhiz75d1Ns(U(QQ8V64uYdPpUz1RpcOVFhecPDJMxj(KsiBsFeuBDwbPMT349PdjOhdVGaodFX2Lli5Bj5lEbYghUWCcp0fGznCwRTHsIJIOe3dPeKU)(TLnmnuh5AHXkkGWu2dzjuwbJ9XebpgYE5WdbwxbiOJ32UUCiTgvW8b2JusCsuOAmgi3FbYUO4ILisJ6JNbuyCFVaO6dCFKoZB2qxWbEUxPJaYUkocVPtPTAMW(Fk1EmKqFixlzT)l0fGzyw8nHgYkrlFD5a2zsXEFnyuN1PcZ2bAHxOKq6pWssL0bV9mH8NB9PE1FM92aCnwWoyoGs0kRhQz3nz8TF6UTHlQBGHXzGCRI5M2r2OOLzmHgvKx1id71I5Sqw3InOVMLN(c42EySpuVDn15xQuCKFPsBybryQWW)DpxwWDJzMcwRx6ZWkJKKW4pIgVuAznaKmm)jAEnKP(zhxMgmIGrFeBcfayIjBAuqrhd7(xQ5WOKM)RfABdZ0kkAEhY0FX(F)869jJ8J(i447ahXkpWqSFczbuply9r6QBMnjkjE(0zZV5UBtsMoStd4YkrTFs5SN9e45FduwYTGMpeLaADCMaAj3WHX0jW23ndTZF)2ja6DrLggrH1zmlB0E3vOwFXIK(y6Y8vVS4PuKfARg2jVm1ZV(eAT0LpX4Cpgy2t1R1PZULe9eyYWFh8JwmJ9UIr)PW52YJoapcGUdaHVUc3hHJFy3eLKCD8KRbKCaC90Kyql9p)

I use SUF too and i can't replicate your issue, but i had to fix x/y/z coordinates to show my pet

I use SUF too and i can't replicate your issue, but i had to fix x/y/z coordinates to show my pet

The model seems to get all messed up when i use set transform. Is that what you meant by setting x,y,z?

no

no

So what did you mean by setting x/y/z coordinates?

After importing your aura :

Modified offsets:

if i /reload it show without opening weakauras options

if i /reload it show without opening weakauras options

I can mess around with the x,y,z offsets. I have that showing properly. Doing a /rl, it stays there. But if I logout or exit, it will not show up again until I do /wa. Every trigger I try mentioned in original post works, as long as its already loaded by doing /wa. If I intentionally mess up the trigger, the portrait will disappear. If I correct the trigger, it shows up. It has something to do with when logging into the game, something I'm missing or perhaps a bug in Weakauras.

Update: I made a border(background) for this and it shows up upon login, but the model isnt there.
Update: If I do a /rl after game is already loaded, the models show up.

If I change model settings to Use Display Info ID to 81975, this works upon login.

This is fixed for the next release.