FS-529 Stapling first Page only

[CopierNerd]

Greetings Everyone!

For the first time i am experiencing a problem with FS-529 in bizhub 363, it staples first page only regardless of sort or group. It staples first single page and rest of the pages are null. Any suggestions?

Thanks

[tsbservice]

Here:
fs 529 new seal? take a look (https://www.copytechnet.com/forums/konica-minolta/76127-fs-529-new-seal-take-look.html)
Those POMs are replaced with modified roller with rubber.