There are issues with Aluber being able to revive himself on a Fusion monster leaving the field by card effect as well as by destruction in battle.
Bug reproduction steps
- Have Aluber in GY, without having used his on-summon effect
- Have Fusion Monster on field
- Have Fusion Monster leave the field by opponents card effect (In this case it was due to Eldlich effect from hand)
- Expect Aluber to trigger, but it doesn’t
No replay available
Aluber triggers, targets a viable opponents monster, then summons and negates the targeted monster
What OS are you using
Do you have a replay showcasing this issue?