example:
2 rows of debuffs on target, one or more of the icons in row 1 is emphasized -> it overlaps with icons in row 2
this weirdly doesnt happen every time but does mostly

A screenshot would make fixing this way easier if you can manage.

will try to SS next raid im in, but for now a paint of what im trying to say :)
https://i.imgur.com/gIoT5Bm.png
red = normal debufs
yellow = emphasized debuff (size of 2x2 normal debuff icons)
red/yellow area = normal debuffs going over the bottom part of emphasized icon

doesnt happen every time but most of the time when there's a lot of debuffs on target

I know what you are saying but it would help me to know which position was emphasized when the error happened.

ill try to remember to SS it next few times it happens

SS w/ overlaps
https://i.imgur.com/slvUJwW.png
https://i.imgur.com/8wpS2dh.png
https://i.imgur.com/nomPsk2.png
https://i.imgur.com/wrYW4DE.png

and sometimes its "ok" like this
https://i.imgur.com/XDF14hX.png