Browsing OK but no streaming on Samsung TV

Hello,
I used to use Minidlna server on my Raspberry PI for sharing videos in the house. I'm trying to switch to serviio, as I was missing some features.
The server works flawless when I use my pc as client (both VLC nd WMP).
But from my Samsung TV (QE49Q64RATXZT) I can browse folders and categories without problems but when I try to launch a movie the stream can not be played. It stucks on loading wheel.
Transcoding is off and the same file can be played from minidlna. So I think it's not file related. I tried to change several profiles (but with transcoding set to off I do not know if that could help) but no one worked.
Below you can find my log.
Thank you very much for your help
F.V.
2020-02-01 15:29:22,896 DEBUG [VideoDeliveryEngine] Retrieving resource information for item 1, format AVC_MKV_HP_HD_AAC_MULT5 and profile Samsung TV / player (C/D-series)
2020-02-01 15:29:22,900 DEBUG [MediaResourceRetrievalStrategy] Getting information about media item 1 (local)
2020-02-01 15:29:22,902 DEBUG [MediaItemDAOImpl] Reading a MediaItem (id = 1)
2020-02-01 15:29:22,911 DEBUG [VideoDAOImpl] Reading a Video (id = 1)
2020-02-01 15:29:22,916 DEBUG [VideoDeliveryEngine] Delivering item '1' for client 'Identifier=192.168.100.117, Profile=Samsung TV / player (C/D-series), Name=QE49Q64RATXZT'
2020-02-01 15:29:22,917 DEBUG [VideoDeliveryEngine] Delivering file '1941 allarme a Hollywood (1979).mkv' in native format
2020-02-01 15:29:22,923 DEBUG [MediaItemDAOImpl] Getting file of media item 1
2020-02-01 15:29:22,933 DEBUG [GETMethodProcessor] Stream entity has length: 499231458
2020-02-01 15:29:22,934 DEBUG [ResourceTransportRequestHandler] HTTP/1.1 206 Partial Content, headers = [[Content-Length: 499231458,Content-Type: video/x-mkv,Cache-control: no-cache,Connection: close,Content-Range: bytes 6144-499237601/499237602,contentFeatures.dlna.org: DLNA.ORG_PN=AVC_MKV_HP_HD_AAC_MULT5;DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01500000000000000000000000000000,Date: Sat, 01 Feb 2020 14:29:22 GMT,realTimeInfo.dlna.org: DLNA.ORG_TLAG=*,Server: Linux UPnP/1.0 DLNADOC/1.50 Serviio/2.0,transferMode.dlna.org: Streaming]]
I used to use Minidlna server on my Raspberry PI for sharing videos in the house. I'm trying to switch to serviio, as I was missing some features.
The server works flawless when I use my pc as client (both VLC nd WMP).
But from my Samsung TV (QE49Q64RATXZT) I can browse folders and categories without problems but when I try to launch a movie the stream can not be played. It stucks on loading wheel.
Transcoding is off and the same file can be played from minidlna. So I think it's not file related. I tried to change several profiles (but with transcoding set to off I do not know if that could help) but no one worked.
Below you can find my log.
Thank you very much for your help
F.V.
2020-02-01 15:29:22,896 DEBUG [VideoDeliveryEngine] Retrieving resource information for item 1, format AVC_MKV_HP_HD_AAC_MULT5 and profile Samsung TV / player (C/D-series)
2020-02-01 15:29:22,900 DEBUG [MediaResourceRetrievalStrategy] Getting information about media item 1 (local)
2020-02-01 15:29:22,902 DEBUG [MediaItemDAOImpl] Reading a MediaItem (id = 1)
2020-02-01 15:29:22,911 DEBUG [VideoDAOImpl] Reading a Video (id = 1)
2020-02-01 15:29:22,916 DEBUG [VideoDeliveryEngine] Delivering item '1' for client 'Identifier=192.168.100.117, Profile=Samsung TV / player (C/D-series), Name=QE49Q64RATXZT'
2020-02-01 15:29:22,917 DEBUG [VideoDeliveryEngine] Delivering file '1941 allarme a Hollywood (1979).mkv' in native format
2020-02-01 15:29:22,923 DEBUG [MediaItemDAOImpl] Getting file of media item 1
2020-02-01 15:29:22,933 DEBUG [GETMethodProcessor] Stream entity has length: 499231458
2020-02-01 15:29:22,934 DEBUG [ResourceTransportRequestHandler] HTTP/1.1 206 Partial Content, headers = [[Content-Length: 499231458,Content-Type: video/x-mkv,Cache-control: no-cache,Connection: close,Content-Range: bytes 6144-499237601/499237602,contentFeatures.dlna.org: DLNA.ORG_PN=AVC_MKV_HP_HD_AAC_MULT5;DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01500000000000000000000000000000,Date: Sat, 01 Feb 2020 14:29:22 GMT,realTimeInfo.dlna.org: DLNA.ORG_TLAG=*,Server: Linux UPnP/1.0 DLNADOC/1.50 Serviio/2.0,transferMode.dlna.org: Streaming]]