I just checked 9.0.6.0 with mkv.h264.audiocopy and it works as expected, including chapter markers:-
Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 27mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 89.0 MiB (20%)
Language : English
Default : Yes
Forced : No
Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 27mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 89.0 MiB (20%)
Language : Italian
Default : No
Forced : No
Audio #3
ID : 4
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 27mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 89.0 MiB (20%)
Language : Czech
Default : No
Forced : No
Text #1
ID : 5
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : English
Default : Yes
Forced : No
Text #2
ID : 6
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Italian
Default : No
Forced : No
Text #3
ID : 7
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Dutch
Default : No
Forced : No
Text #4
ID : 8
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Czech
Default : No
Forced : No
Text #5
ID : 9
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Hindi
Default : No
Forced : No
Text #6
ID : 10
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : English
Default : No
Forced : No
Menu
00:00:00.000 : en01)00:00:00:000
00:06:18.000 : en02)00:06:18:000
00:12:24.000 : en03)00:12:24:000
00:16:39.000 : en04)00:16:39:000
00:23:40.000 : en05)00:23:40:000
Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 27mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 89.0 MiB (20%)
Language : English
Default : Yes
Forced : No
Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 27mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 89.0 MiB (20%)
Language : Italian
Default : No
Forced : No
Audio #3
ID : 4
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 27mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 89.0 MiB (20%)
Language : Czech
Default : No
Forced : No
Text #1
ID : 5
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : English
Default : Yes
Forced : No
Text #2
ID : 6
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Italian
Default : No
Forced : No
Text #3
ID : 7
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Dutch
Default : No
Forced : No
Text #4
ID : 8
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Czech
Default : No
Forced : No
Text #5
ID : 9
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : Hindi
Default : No
Forced : No
Text #6
ID : 10
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : The same subtitle format used on DVDs
Language : English
Default : No
Forced : No
Menu
00:00:00.000 : en01)00:00:00:000
00:06:18.000 : en02)00:06:18:000
00:12:24.000 : en03)00:12:24:000
00:16:39.000 : en04)00:16:39:000
00:23:40.000 : en05)00:23:40:000
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