KOreader progress sync not working between Kobo Libra 2 and Boox Palma

I am unable to sync between my Boox Palma and Kobo Libra 2 using koreader,'s progress sync is the file extension on the KL2 is kepub.epub causing the issue?

I used both binary and file matching.

Hopefully someone has gone through the same experience!

Thanks!