Hey there. I've noticed that, at least in episodes 21-25 of Ultraman Leo, there seems to be some odd audio problems. Claps and footsteps frequently sound like they get doubled or start echoing, and songs will often seem to have two of the song starting at different times playing at once. (The most egregious example of this is when, at the end of episode 25, the theme song kicks in as Leo fights and defeats the Satan Beetle.) Also, the voices tend to be a lot lower.
Some of the episodes were better than the others, but, overall, these issues are pretty noticeable and distracting.