I had problem with multiple debian distros but many people has similar
problems with multiple ubuntu or similar.

I decided to use my partition labels in the name of the menuentries.

The whole idea is here: https://unix.stackexchange.com/a/408540/237337

I added a variable :

PTLABEL="`echo $(blkid -po udev  ${DEVICE} |grep LABEL_ENC| sed 's/^.*=//')`"

that is been used in my entries.

An easy fix for the developers is to add such a variable and use it if
the $OS variable

is common with a previous entry.
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