Supabase Login – Refresh Token Not Working for Long-Duration Sessions

[NallaMuthu-VRDev]

Hi team, I’m facing an issue with Supabase authentication in my Unity project. According to the docs, a refresh token should keep the user logged in for 30 days, but in my app the session becomes invalid after about 3 hours.

My scenario

Logged in last night around 8 PM
Session saved to PlayerPrefs through a custom UnitySupabaseSessionHandler
This morning around 11 AM, when reopening the app, RetrieveSessionAsync() returned null
It looks like the refresh token failed to refresh the access token, even though AutoRefreshToken = true is enabled

Setup
var options = new SupabaseOptions
{
AutoConnectRealtime = false,
AutoRefreshToken = true,
SessionHandler = new UnitySupabaseSessionHandler()
};

Session saving and loading look correct based on logs, but after a long gap (3–15 hours), Supabase returns no active session.

My questions

Is this a known issue with the C# SDK, refresh token rotation, or Unity environment?
Should the 30-day refresh token consistently allow reconnection after long inactivity?
Is additional handling required on Unity side to make long-lived sessions reliable?

I have also attached my UnitySupabaseSessionHandler.cs file as a .txt for reference.
UnitySupabaseSessionHandler.txt

Thanks in advance for any help!