Resume/FF/REV AVC video streams on Roku

[Starlionblue 82]

I've found that if I try to resume, rewind or fast forward an AVC stream on Roku, it will always just restart from the beginning. Is this a Roku "feature" or am I doing it wrong?

Mediainfo of a file below.

General
Complete name                            : S:\TV Series\Documentaries - Series\Guy's Garage\Season 1\Guy's Garage - 1x02 - Episode 2.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 1.89 GiB
Duration                                 : 46 min 49 s
Overall bit rate                         : 5 779 kb/s
Writing application                      : no_variable_data
Writing library                          : no_variable_data

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 46 min 49 s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 25.000 FPS
Standard                                 : Component
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Language                                 : English
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : A_AAC-2
Duration                                 : 46 min 49 s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Language                                 : English
Default                                  : Yes
Forced                                   : No

Text
ID                                       : 3
Format                                   : DVB Subtitle
Codec ID                                 : S_DVBSUB
Codec ID/Info                            : Picture based subtitle format used on DVBs
Language                                 : English
Default                                  : No
Forced                                   : No

Menu
00:00:00.000                             : PART_01
00:16:14.030                             : PART_02
00:26:42.030                             : PART_03
00:35:37.030                             : PART_04

 

 

[Luke 42077]

Hi there, can we please look at an example of how it's playing?

Thanks !