Hi, these bugs are due to player colliders and maps. I used TileMap and created its own collider for each tile. These two bugs have exactly this effect. When passing through walls, the player gets stuck between two tiles colliders. When jumping from walls, the player partially passes into the wall, the condition is triggered that the player has touched the ground and can jump.
If I fix one bug, the second one will also be fixed ¯\_(ツ)_/¯
When I make the next platformer, I will take these mistakes and make the colliders separate from the tilemap.