1080p MKV File withs DTS High Res
Sound laggs via Passthrough. With 7.23 no issues
Audio #1
ID                                       : 2
Format                                   : DTS XBR
Format/Info                              : Digital Theater Systems
Format_Commercial_IfAny                  : DTS-HD High Resolution Audio
Codec-ID                                 : A_DTS
Dauer                                    : 1 h 45 min
Bitraten-Modus                           : konstant
Bitrate                                  : 2 046 kb/s
Kanäle                                   : 6 Kanäle
ChannelLayout                            : C L R Ls Rs LFE
Samplingrate                             : 48,0 kHz
Bildwiederholungsrate                    : 93,750 FPS (512 SPF)
BitDepth/String                          : 24 bits
Stream-Größe                             : 1,51 GiB (9%)
Titel                                    : 5.1 DTS-HD.HR
Sprache                                  : Deutsch
Default                                  : Ja
Forced                                   : Ja
Server Version 1.18.2.2015
Beta kepler-arm64v8a-googlePlay-stdExo-7.24.0.13641-96ca12d1.apk
Shield 2019 Pro (8.1)
Edit: 4K with DTS HD Master 5.1 Passthrough laggs too. 7.24 have a Problem with DTS HD 
Edit 2: no matter what video with dts-hd. I tried everything. (version 7.25)