English translation of OP:
Please translate your next reply into English since this is a English Only Forum.
Sounds like you have some sort of conflict with your AMD driver.
First install the latest AMD Driver for your RX6700XT: https://www.amd.com/en/support/downloads/drivers.html/graphics/radeon-rx/radeon-rx-6000-series/amd-r...
If the problem continues then install a previous AMD Driver to see if the issue is fixed with an older driver installed from here: https://www.amd.com/en/support/downloads/previous-drivers.html/graphics/radeon-rx/radeon-rx-6000-ser...
Make sure to use DDU (Display Driver Uninstaller) and delete if created C:\AMD installation folder. after DDU reboots back into Windows install the driver and see if it fixes the problem.
If the latest AMD driver is not working and a previous AMD Driver fixes your problem then open a AMD SUPPORT TICKET and let them know from here: https://www.amd.com/en/forms/contact-us/support.html
NOTE: IF neither latest or previous AMD driver fixes your problem then boot into a Windows Clean Desktop and enable the AMD driver and see if it works. If it does that would indicate a 3rd party driver or app has a conflict with the AMD Driver.
How to do a Clean boot into Windows: How to perform a clean boot in Windows