@Ivona Hammarstedt - I am on Windows 10 64-bit and not experiencing this in the latest Chrome or Firefox browser, or in the Miro desktop app.
I suggest that you:
- Try disabling all browser extensions (Incognito/a private browser window usually does this)
- Try another browser
- Try another device
- Try Miro desktop app
- Disable any VPN
- Disable any anitvirus/malware scanners
- Try another internet connection
If none of those help you narrow down/determine the culprit, then I suggest you report this to Miro support.
You can use the following article to learn more about what you should provide to support (in this case the browser console log may be of significance) → How to Report Bugs
This then you can follow the steps in this post to contact Miro support → How to Contact Miro Support.