SPen

[THEKINGSON]

My S pen keeps disconnecting when ever I remove the it 

[GaryB82]

Sounds like the capacitor that holds the charge which allows it to connect to your phone has went bad and the spen needs to be replaced 

[MrGhoul]

Make sure air actions are on in device settings.
Most times, restarting the phone fixes this.
https://www.samsung.com/latin_en/support/mobile-devices/what-to-do-if-your-s-pen-is-often-disconnect...