Videotext size mismatch

Hi Folks,

i use Kodi 17 Krypton and have a problem with the videotext or teletext size.
A Picture says more then thousand words:

The teletext should be bigger. I checked allready the option for 16/9 teletext and it only changed
the size of the black part.

The Kodi Log is here: http://pastebin.com/FuECjxZi

So i use Win7 SP1 64 Bit on a AMD CPU/GPU.
The source for the teletext is NextPVR.

The log file is fresh, I started Kodi, activated a tv-chanel, activated the teletext,
Screenshot taken, stopped the teletext. stopped the tv-chanel and finally closed Kodi.

I can remember that the teletext worked flawless in Kodi 16 on this machine.

Anybody a idee what i could try to make the videotext/teletext to be the correct size?

A sidenote: On my mac with Kodi17 with the same Windows machine as a source for the nextpvr the teletext works
with the correct size *g*