I checked at “whatleaks.com” and saw that if using brave shield on then lots of open ports detected. If I use vpn extension then dns leak and open port detected at whatleaks.com. But if I disabled shield then everything is perfect. i also checked chrome, firefox and vivaldi browser which is perfect when I checked at whatleaks.com. I found this issue last 4/5 updates and not resolved. Everything was perfect before. Please check and resolve the issue.
I also check my brother and friends pc and found same issue.