Please be noted that we support English in the Roku Community and we use Google translate to respond to any unsupported language to understand the issue or inquiry.
I have a few questions to better understand the behavior you are seeing:
When did this issue first start occurring?
Do you observe this behavior while using any other channel(s) on your device?
Have you tried removing the channel, restarting your device from Settings>System>Power>System restart (If you do not see a Power submenu, skip to the next step), then once it loads up again, adding the channel back once more to see if that clears things up?
What troubleshooting steps have you taken so far to try to resolve the issue?
With more information, we will be able to assist you further.