then it looks like an FFmpeg bug to me:
In logs "error" does not always equal a fatal problem. In fact most of the time it is nothing more than the application following some kind of if/then/else decision tree when processing data. Is the file mp3; no (so log error on that path, keep processing) is more likely to be the cause (or something of that nature). If you read the log further the file is clearly being played so it wasn't fatal.
BokitoNL You didn't share the output of pastekodi so we don't see the system log (only kodi log) but I'm not seeing anything in the kodi log to indicate an HDMI output problem. I would advise to check cables and ports and also ensure config.txt is in a clean or default state without any kind of helper overrrides being used.