For confirmation that my auto_delink_en setting was kept by the default after rebooting (so I made sure that initramfs was containing correct settings):
So it looks like the module boots correctly and having the default auto_delink_en setting, but for the specific device it's not using the setting. So fix confirmed!
For confirmation that my auto_delink_en setting was kept by the default after rebooting (so I made sure that initramfs was containing correct settings):
root@sirius:~# cat /sys/module/ ums_realtek/ parameters/ auto_delink_ en
1
So it looks like the module boots correctly and having the default auto_delink_en setting, but for the specific device it's not using the setting. So fix confirmed!