Currently on the 1.19.4 version of the 32x Faithfull (and likely but unverified for 64x) there is an issue with the diamond chestplate and armor trims.
Some trims (here Coast trim) floats over the shoulder gap on the diamonds chestplate juste like in the image. So I wondered if the issue was considered for the upcoming 1.20 version.
(Don't mind the GUI it's just a server plugin)