Mysterious vibrations from "System Interface"

For some time my Samsung Galaxy Note 9 vibrates for no apparent reason. It’s a very short vibration with no notification of any kind so at first I thought I’m imagining things. But I noticed it’s really there so I tried to find out which app is to be blamed – using Nice Catch I got a Vibration history for my phone (please excuse polish language on the screenshots):

Here comes the issue: these irregular vibrations come from Interf. sys. which I presume stands for System Interface. But as you can imagine googling "Android System Interface" wasn’t very successful. Logo is just an Android Q logo so that doesn’t help either.

I found this app among system applications, but it’s Notifications settings are all locked (except for Screenshots and App icon notifications):

So now I’m kinda stuck and have no idea how to proceed. Any ideas on what I can do to disable those irritating vibrations?