Description of the issue:
In some websites there will be CloudFlare robot verification, but in the middle of the verification, the verification button will disappear.
The same does not happen with other browsers, such as Chrome and Edge
Actual Result (gifs and screenshots are welcome!):
Sorry 
but new user cannot upload attachment
Expected result:
Successful access to the target site
Reproduces how often:
Every time
Operating System and Brave Version(See the About Brave page in the main menu):
The latest Brave version (v1.52.130)
Additional Information: