If this list doesn't solve your clutch issues you've got an extremely rare problem. Every now & again I encounter an issue with the push rod or actuator on a cable clutch and sometimes a sticky or frayed cable. Otherwise this is about it.
True Tech Community:
https://true-tech-community.mn.co/plans/1477366?bundle_token=5821076e0d4ee6a18a8ef95527235218&utm_source=manual
TPI service manual:
https://print.ktm.com/skyco13/XIII-KTM-1/_distri/out/2023__TE_300__EU_US_RM_40sq_winj.pdf
Clutch Damper Video:
https://youtu.be/XtjGM1w84Qk?si=K6ERTzsWsjWE8dL5
Rekluse damper kit part number: RMS-0213080
Flow chart:
https://drive.google.com/file/d/1aPkxUoEs3CUm6W75CxsewkeoTEUchSMQ/view?ths=true