Remuxes are not affected, only encodes with x265 version 3.1.*+. The CE team has acknowledged the issue and will look further into it. In the meantime, use seek to prevent stuttering on Amlogic-ng (S905X2, S922X etc) or use old Amlogic (S905,S912) for playback of encodes.
Hint: All releases which are marked x265 are encodes, and you can easily see it in mediainfo with
Writing library: x265 version [OS etc.]
Encoding settings: different parameters