Not A Bug Arena Trap fails on Ghost type

[xxyyxxyyxx]

What type of bug are you reporting? Random Battles

What is the bug?
my dugtrio's arena trap was not able to trap opponent gengar for soem reason
https://replay.pokemonshowdown.com/gen9randombattle-2169260801-km237ib150fepv7jkn8o3jrtbc3tbilpw

Are you able to replicate it? If so, how?
no

 

[Karthik]

Ghost types are immune to all trapping effects.