Silph Co. trapped glitch
The Silph Co. trapped glitch, also known as the Team Rocket glitch is a glitch in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!
Summary
This glitch takes place before Team Rocket have been cleared from Silph Co.
Going to Silph Co.'s 5F and standing at a specific corner of the room has the potential of blocking the player.
Further details are unknown, other than it may not truly be a trap as the player may escape by sending a Support Trainer via co-op mode.