Why this happens
TCGplayer’s session cookies don’t include an expiration header that would let a browser treat them as persistent, and “Remember Me” doesn’t change that on TCGplayer’s side. Because of that, your agent’s session lives only in memory for as long as its browser process stays running:- The first time the agent needs TCGplayer, it requires a manual login.
- Every cycle after that reuses the same in-memory session, without asking you to log in again.
- If the browser process ends — a crash, a computer restart, the desktop app closing — that in-memory session is gone. The next cycle opens a fresh login window and needs you to sign in manually again.