TypingMind Cloud logs out too often on Brave browser

I use the same TypingMind Cloud account on 3 devices. Brave on my desktop (mac), Brave on my Android, and Safari on iPhone.

The Cloud sync on Safari iPhone stays logged in for a long time, even when I don't use it. I believe it stays logged in for at least 20 days, if not more. I have never been logged out of my Cloud sync on Safari.

But the Cloud sync on both Desktop and Android, which use the Brave browser, gets logged out unreliably. Sometimes, I feel it gets logged out if I don't use the device for about 4 days—I don't know the exact number. Every time I use TM Cloud on Brave, I need to check if it is syncing or not.

Can you check why cloud sync on Brave browser gets logged out so quickly? Happy to provide any logs or other information to help debug.