[Bug] Status-Prevention Abilities do not Cure Status

[Snailman11]

Describe the bug

Immunity and Pastel Veil does not cure the Poison status after a Pokémon with Immunity is Poisoned.

Limber does not cure Paralysis after a Pokémon with Limber is Paralyzed

Insomnia does not cure Sleep after a Pokémon is put to Sleep

Water Veil does not cure Burns after a Pokémon is Burned.

Magma Armor probably does not cure Freeze, but I don't want to deal with the 10% proc.

Oblivious does not cure Taunt

Own Tempo does not cure Confusion

Link to Discord's Bug Report (Immunity ability does not stop Toxic Orb poisoning)
https://discord.com/channels/1125469663833370665/1254195713626083408

Reproduction

Use Will-O-Wisp, Thunder Wave, Spore, and Toxic, or Oblivious and Own Tempo with a Pokémon that has Mold Breaker on the respective Ability.

This should also apply with Neutralizing Gas, which has issues with abilities reactivating (#3905)

Expected behavior

Toxic Poison should immediately be cured when the ability is reactivated
 https://replay.pokemonshowdown.com/gen9customgame-2257080241-fj97ehzhf1116bpgf33dkdn2tsz0f20pw

https://bulbapedia.bulbagarden.net/wiki/Category:Abilities_that_can_heal_non-volatile_status_conditions

https://bulbapedia.bulbagarden.net/wiki/Category:Abilities_that_can_heal_volatile_status_conditions

Screenshots / Videos

Immunity + Mold Breaker

Immunity.does.not.cure.Poison.mp4

Insomnia + Mold Breaker

Insomnia.mp4

Limber + Mold Breaker

Limber.mp4

Pastel Veil + Mold Breaker

Pastel.Veil.mp4

Water Veil + Mold Breaker

Water.Veil.mp4

Oblivious + Mold Breaker

ObliviousTauntMOldBreaker.mp4

Own Tempo + Mold Breaker

OwnTempoConfuseRayMoldBreaker.mp4

Session export file

No response

User data export file

No response

Additional context

PURIFYING SALT SHOULD NOT CURE STATUS UPON BEING GAINED/REACTIVATED, unlike other abilities with StatusEffectImmunityAbAttr

If the Pokémon has a status condition and gains this Ability, the status condition will not be cured and remains in effect.
-Bulba

-When being Switched out, if the status preventing ability is suppressed, then the status condition will not be healed.

https://replay.pokemonshowdown.com/gen9customgame-2257437771

-If Trace would give a Pokemon an Ability that prevents the status condition, then the status will be cured at the end of the round.

Normal switch against T spikes, Trace gaining Immunity
https://replay.pokemonshowdown.com/gen9customgame-2257432270

Slow U-Turn against T-Spikes, takes damage, then is cured
https://replay.pokemonshowdown.com/gen9customgame-2257434225

Fast U-turn against T-Spikes, does not take damage and is cured
https://replay.pokemonshowdown.com/gen9customgame-2257436315

-It seems that it waits for another Pokémon to make a move and cures itself at the end of that move. otherwise, it cures at the {very start of the next/very end of the] round.

-Check functionality for
Immunity is unsuppressed or gained by trace from faint switch in

https://replay.pokemonshowdown.com/gen9doublescustomgame-2290281986
Sweet Veil does not Heal Sleep like Insomnia, it only prevents it.

[Snailman11]

#4686
Oblivious and Own Tempo

-Previous Github Issue for this that I did not see