That was it.
each Channel had "Use EPG Running State" set to ON.
My file is 55min. (30min show + 5min-Pre + 20min-Post)
MediaInfo:
General
ID : 2055 (0x807)
Complete name : \\nas\RecordedTV\NAS-PVR\2017-12-13 - Friends - 9Go!.ts
Format : MPEG-TS
File size : 1.63 GiB
Duration : 55 min 15 s
Overall bit rate mode : Variable
Overall bit rate : 4 210 kb/s
Video
ID : 1721 (0x6B9)
Menu ID : 1 (0x1)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings : CustomMatrix / BVOP
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : Variable
Format settings, picture structure : Frame
Codec ID : 2
Duration : 55 min 14 s
Bit rate mode : Variable
Bit rate : 3 743 kb/s
Maximum bit rate : 15.0 Mb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Active Format Description : Full frame 16:9 image
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.361
Stream size : 1.44 GiB (89%)
Audio
ID : 1722 (0x6BA)
Menu ID : 1 (0x1)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 55 min 15 s
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Delay relative to video : -312 ms
Stream size : 101 MiB (6%)
Language : English
Text
ID : 1723 (0x6BB)-801
Menu ID : 1 (0x1)
Format : Teletext Subtitle
Language : English
Menu
ID : 1720 (0x6B8)
Menu ID : 1 (0x1)
Duration : 55 min 15 s
List : 1721 (0x6B9) (MPEG Video) / 1722 (0x6BA) (MPEG Audio, English) / 1723 (0x6BB)-801 (Teletext Subtitle, en)
Language : / English / English
Service name : 9Go!
Service provider : SCA
Service type : digital television