Hi Shikoro,
Sorry for the late reply!
We’ve addressed this very issue in another topic. To find out how you can resolve it, please click on the following link:
problem in header after upgrading wordpress to 5.9
In this topic, we found out that this issue was was related to Kirki. We reported this and the last update seemed to fix this. Could you please update your theme and all recommended plugins, as Kirki?
Then, we suggest you to clear all activated caching system as well as your browser cache before investigating any further.
We hope this will help you solve this. Don’t hesitate to keep us up to date about this.
Cheers,