The Telescope Issue if i Open Inventory

I have Problem on Telescope if i Holding this While Crouching , If i Open my Inventory with Holding a Telescope, the Telescope suddenly Going to Left Quicly and Back at Original Position, If my Text no Convincing maybe Check the Video i Brought it, and my Minecraft Version i Playing is 1.17.30.20 BETA Can you Pls Fix this Issue because its make Unconfortable