Default Map drop sound different for maps of same tier

This season I have noticed that some maps make a different and louder noise when they drop, seemingly for no reason. This occurs even with no item filter on so it is something with the default drop noises. For instance drop a tier 1 Lookout map and compare that to any of the other tier 1 maps, it is much louder and very annoying.


Tier 1: Lookout
Tier 2: Alleyways, Pen
Tier 3: Leyline, Excavation, Springs, Iceberg
Tier 4: Courthouse, Chateau, Lighthouse
Tier 5: Haunted Mansion, Conservatory,

This continues into the higher tier maps and is not a full list.