[smp1]

 I can confirm the buffering issue with .m2ts and .ts files. The issue occur during the playback over LAN (SMB). Local playback seem to be ok. The same videos play fine if remuxed to mkv.    

Is this a recent problem in these builds? Identifying the first build with the problem would be useful.    

I reported this issue back in november (issue with sample #1 was fixed, sample #2 is still unplayable). I guess it was broken some time in autumn. Early post-kodi 17 builds definitely had no issues with ts/m2ts.