Tvheadend

Hello,

i using a fitz wlan repeater dvb-c (to stream dvb-c in my wlan/WIFI) and an rasp Pi3 with Libreelec and Kodi (to record with tvheadend).
The recording works normaly fine (for films/programms that are shorter then one hour. But for for films/programms that are longer then one hour tvheadend is often only recording a part of the film/programm and break up before the end. :-(

I had more than enough storage left on my. And I found no clue in the internet. Therefore I had started new. I had setup a new system. I had made a new installation on a new Pi with new SD-Card and new power adapter. But I had have the same problems. :-(

Could anyone give me a hit (why tvheadend does not record the end of a film/programm)???
Or could someone tell me how to fined the root of that problem e.g. what logfiles could give me an idear of that problem?

Thanks in advanced