Jibri not working with namespace in Docker

Hello,

I have problem with jibri when I use userns-remap.
I have this logs:
2021-05-07 06:36:45.361 FINE: [51] org.jitsi.jibri.statsd.JibriStatsDClient.log() Incrementing statsd counter: start:recording
2021-05-07 06:36:45.361 INFO: [51] org.jitsi.jibri.status.JibriStatusManager.log() Busy status has changed: IDLE → BUSY
2021-05-07 06:36:45.362 FINE: [51] org.jitsi.jibri.webhooks.v1.WebhookClient.log() Updating 0 subscribers of status

2021-05-07 06:36:52.588 FINE: [18] org.jitsi.jibri.util.ProcessStatePublisher.log() Process ffmpeg hasn’t written in 2 seconds, publishing periodic update
2021-05-07 06:36:52.589 INFO: [67] org.jitsi.jibri.capture.ffmpeg.FfmpegCapturer.log() Ffmpeg quit abruptly. Last output line: plug:bsnoop: Input/output error
2021-05-07 06:36:52.591 INFO: [67] org.jitsi.jibri.capture.ffmpeg.FfmpegCapturer.log() Ffmpeg capturer transitioning from state Starting up to Error: QuitUnexpectedly SESSION plug:bsnoop: Input/output error
2021-05-07 06:36:52.592 INFO: [67] org.jitsi.jibri.service.impl.FileRecordingJibriService.log() File recording service transitioning from state Starting up to Error: QuitUnexpectedly SESSION plug:bsnoop: Input/output error
2021-05-07 06:36:52.594 INFO: [67] org.jitsi.jibri.api.xmpp.XmppApi.log() Current service had an error Error: QuitUnexpectedly SESSION plug:bsnoop: Input/output error, sending error iq
2021-05-07 06:36:52.595 FINE: [67] org.jitsi.jibri.statsd.JibriStatsDClient.log() Incrementing statsd counter: stop:recording
2021-05-07 06:36:52.597 INFO: [67] org.jitsi.jibri.JibriManager.log() Stopping the current service
2021-05-07 06:36:52.597 INFO: [67] org.jitsi.jibri.service.impl.FileRecordingJibriService.log() Stopping capturer
2021-05-07 06:36:52.598 INFO: [67] org.jitsi.jibri.util.JibriSubprocess.log() Stopping ffmpeg process
2021-05-07 06:36:52.601 INFO: [67] org.jitsi.jibri.util.JibriSubprocess.log() ffmpeg exited with value 1

If I add the option userns_mode: "host" everything is fine.