Not A Bug Stellar doesn't change your actual typing

[the blud]

What type of bug are you reporting? Mechanics

What is the bug?
When playing a doubles OU match when the opposing Skeledirge kept its type immunity to normal despite having terastallized into stellar the previous turn, so my Kommo-o's boomburst "had no effect" on it even though it lost it's ghost type. Other moves like matcha-gatcha Skeledirge resisted despite being tera stellar so those moves should actually be neutral. In my opponents point of view, when you check (hover over) Skeledirge it says that it terastallized into ghost and fire.

Are you able to replicate it? If so, how?
I can not replicate it at the moment, but I do have the replay of the match https://replay.pokemonshowdown.com/gen9doublesou-2308093786
the bug occurs on turn four is when the tera stellar Skeledirge does not get effected by the move.

 

[Kin+ak (✧∇✧)]

No expert here but You do keep your resistances and weaknesses and immunities etc when Tera'ing into the stellar type, the Stellar type's effect is to hit every tera type for Supereffective and to be neutral against everything else, and a Pokémon Tera'd into the Stellar type gets a Tera Boost on the first move of a certain type it uses. Zacian-Crowned for example, when Tera'd into the stellar type, getsa boost Oce on Close Combat, Once on Play rough, once on Behemoth Blade, but if it uses the move again, it won't be boosted. A Rillaboom Tera'd into the Stellar type will get a boost on wood hammer or Grassy glide, but if either is used, the other won't receive the boost because they're the same type