There’s no way to show this in the replay, but I’ll try to record it if it happens again. For now, I have a screenshot of the issue:
I activated Drytron Meteonis’s effect from the GY. The screenshot was taken at the moment I was trying to select a valid Drytron monster to reduce its ATK and return the spell to my hand. As you can see, all three Drytrons have the white outline, indicating they are valid targets for the effect. However, selecting Fafnir or Nu II didn’t do anything. I was forced to select DAD instead.
It wasn’t a big deal in this particular match, but it was still pretty annoying.
There isn’t any known game state where I shouldn’t be able to target a Drytron with this effect. It’s strange, and I have no idea what could have triggered this bug. It felt completely random. I activated the ritual spell’s effect multiple times in other games the same day without any issue.