I exported a OFT file using the 2.4.1 (942) version but MS Word does not recognize the opentype features.
The file works well on Glyphs and Adobe CC.
For a testing propose I created a file with a basic ligature using 2.41 version and it does not work as well, but I repeat the same process using a glyphs Version 1.4.4 (609) and it works.
Word only recognizes a few features. And they need to be activated. Do you know how to do that? Which feature are you trying to get to work? And have you tried a TTF exported in Glyphs 2?
Can you send me the temp folder of the export from both versions? (you find the Temp Folder next to the Script folder that you can access from the Script Menu).
The languagesystems prefix? In File > Font Info > Features, you can either manually add a prefix with the gear menu in the bottom left, or, better yet, simply click the Update button, and Glyphs will add an appropriate languagesystems entry for your font.