Needs Triage Bug Report - Mechanics

[Snorlax Double]

What type of bug are you reporting?
Mechanics

What is the bug?
I am unsure if this is a bug or how the actual cartridge version works as well but I couldn't find any information on this online. Trapping moves (sand tomb, infestation...) do not stack. Turn 5 in the linked replay, garchomp, who trapped volcarona with sand tomb switches out. Toxapex proceeds to use infestation on the volcarona. at the end of the turn. Volcarona isnt trapped by infestation. I would have thought that Sand Tomb ends as soon as garchomp switches but idk.

https://replay.pokemonshowdown.com/gen9championsvgc2026regmc-2699915119-p3g1f2q2j6r7jxb4m0okbxfc6ppehmppw

Upload an image of the bug if necessary
(no response)

Are you able to replicate it? If so, how?
havent tried it

 

[GentleDnite]

The game checks whether sand tomb is still active at the end of the turn. Hence, this check has not been performed when toxapex used infestation as the turn has not ended yet and sand tomb is still applied to Volcarona. Since binding moves are unable to stack, infestation didn't trap. Hope this clarifies