I don't have a specific fix I can tell you but if this was happening to me and I tried what you did, I would perform a reset of the remote. Look for instructions for your particular remote on the Samsung site but I think holding Return and Enter for 10 seconds will do it. If the above doesn't work I would Factory Reset the TV and don't restore any backup initially and see if it works. And lastly, I would go on Amazon or even Wal-Mart and buy a under $10 universal remote that states it is for Samsung and try that. Like this: https://www.amazon.com/Newest-Universal-Control-Samsung-Compatible/dp/B08CZ1FYBD/ref=sr_1_1_sspa?crid=148OP1LIERF9V&dib=eyJ2IjoiMSJ9.7eAK6SYb6Me5Smx6W_jkSVjnv4GgPGTbY48Tzvwds4RQVnh22TMm_WQ_qFBfShGbDcDGI8hQt7j4I4a8o3unIRhDtn2qJW_NxT5fzxEatjkHG4R4UpcrG7LNd8jWY7ZKZS9LwK9zMtUapjMs0AsCq2xP8-cD6l0m0m762vw_Xe9kgirbjiKElAFc18q2LFSHHIHHVNGrNoqH9vG-mauKqFq0TznncW3zjkl2jE7f_oA.cVJ24IQ7zYlpqddDQWqG9DrMxR102GoOZqumbPiMEm0&dib_tag=se&keywords=Samsung+tv+remote&qid=1719404609&sprefix=samsung+tv+remote%2Caps%2C131&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1
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