[Leonatus]

I have a Kobo Touch original (N905). Just yesterday I downloaded the new firmware 4.6.9960 (mark 3). Everything alright so far, but there are strange issues almost each time at tapping or wiping forward or back: there appears a black frame around the text and the page number (see attached screenshot). I looked at all possibilities of settings, but there is obviously nothing I can do.

I have to tap in the center, then appear the top and bottom menu bars, and when I tap once more, the normal screen is visible. Only sometimes, when I wipe very carefully, the next page of a book appears as it should. Once the black frame present, it will remain at every new page.

Is this known, or is it a single problem of my device?

Any help appreciated.