Login problem on Medium based blogs

Did you search for similar issues before submitting this one? Yes

Describe the issue you encountered: It seems like Medium is always signing me off on Brave.

Expected behaviour: Login on Medium, keep logged in.

• Platform (Win7, 8, 10? macOS? Linux distro?): Ubuntu 16.10

• Brave Version: 0.12.7

• Steps to reproduce:

  1. Navigate to https://thisweekinreact.com (or any other Medium based blog)
  2. Login
  3. Reload the page

• Screenshot if needed:

• Any related issues:

#5437