send_key repeats

[mod25]

Hi,
i'm using your cc with two tvs (48ju and 32j).
after setting it up i get folowing issue on debug:

2020-10-29 14:25:43 DEBUG (SyncWorker_50) [custom_components.samsungtv_custom.media_player] State is on <Response [200]>
2020-10-29 14:25:53 DEBUG (SyncWorker_43) [custom_components.samsungtv_custom.media_player] State is on <Response [200]>
2020-10-29 14:26:03 DEBUG (SyncWorker_44) [custom_components.samsungtv_custom.media_player] State is on <Response [200]>
2020-10-29 14:26:06 DEBUG (SyncWorker_33) [custom_components.samsungtv_custom.media_player] Send key KEY_VOLDOWN
2020-10-29 14:26:06 DEBUG (SyncWorker_33) [custom_components.samsungtv_custom.media_player] Failed sending command KEY_VOLDOWN. Retry!

everytime i hit one key i get it twice.

my config:
media_player:

• platform: samsungtv_custom
  name: WohnzimmerTV
  host: 192.168.178.29
  port: 8001
  mac: ***
  sourcelist: '{"TV": "KEY_TV", FireTV": "KEY_HDMI1"}'
  protocol: ctl_beta
  token: ***:1
  id: ***

maybe someone can help?
thank you