Tvheadend

Try latest master, I think it's fixed already.

I am afraid to say but I still got the issue on the stable repository.
Checked it today with version "HTS Tvheadend 4.2.8-36~g5bdcfd8ac".

cat /etc/apt/sources.list.d/tvheadend.list
deb https://apt.tvheadend.org/stable bionic main

That is not the latest master.

I see. So is there a chance that the fix will go into the latest stable?

There are no real updates anymore for the old 4.2 version, in fact the plan was to shuffle the version Numbers around (as in move forward) as latest master is currently a lot better than 4.2. Unfortunately there is currently nobody working on it and development is pretty much stalled at the moment.

Here is my workaround (cron) script:

#!/bin/bash

RECORDINGS_DIR=/home/hts/recordings

find "$RECORDINGS_DIR" -type f -cmin +5 -iname '*'$'\n''*' -print0 | while IFS= read -r -d $'\0' file; do
        newfile="${file//[[:cntrl:]]/ }" 
        mv "$file" "${newfile}" 
done

It searches for files with newline character (which was changed last time more than 5 min, i.e., stopped recordings) and renames them by replacing any (bash) control character by a space. This should be the same naming like the filename in the dvr log entry.