I´m using KODI a long time on Windows or Mac or Raspberry etc.
I repeat, you don´t need to set any caching parameters if Your local network is working stable.
My N2 is running 24/7 and I watch video every day without any buffering.
High bitrate 4k HDR is playing fine using my local Gb network
i can also take the advanced setting out again and produce the error again. does it just not make sense for me if it only occurs sporadically? i have the problem even with smaller 1080p files and have a 100mb/s internet connection at home.
in the fritzbox i also see that the line is never overloaded.
i test the whole thing again without advanced setting and with a 1080p file. then upload the log again
Messing with the caching settings can cause its own unexpected issues. Best avoided and as has been said elsewhere a correctly functioning local network can stream content even at relatively low speeds. Local networks are complex beasts with many interactions which can upset traffic but are a nightmare to fault find.