Some keys sometimes (F6,6,Y,H,N,Space) do not work

Hi,

My MacBook Pro A1502(Retina, 13-inch, Mid 2014) Big Sur 11.7.10 (20G1427) has a keyboard problem.

The F6, 6, Y, H, N, Space keys, and occasionally the Q, W, E, R, T, U, I, O keys randomly stop working at times. When the F6, 6, Y, H, N, Space keys stop working, they remain non-functional for an extended period (2-3 hours, sometimes a few days).

Once, the 1, 2, 3, 4, 5, 6, 7, 8, 9 keys also didn't work. When I researched on the forum, I found another user who experienced the same issue, and a suggested solution was to press any of the non-working keys 50-60 times. I tried this solution, and it worked. Since then, I haven't encountered any issues with the numeric keys (except 6). Unfortunately, the same approach didn't work for other keys. On the forum, a few more users reported issues with F6, 6, Y, H, N, Space keys, but no solution was found. My keyboard was replaced with a non-original one before. I believe the issue is software-related, not hardware. Sometimes, I go 5-6 days without any key problems, but other times, the F6, 6, Y, H, N, Space keys, and Q, W, E, R, T, U, I, O keys stop working simultaneously. Previously, pressing keys in the Q row multiple times would make them work, but now they don't, and it's extremely frustrating. I've tried resetting SMC, PRAM, and NVRAM, but it didn't help.

I know it's a lengthy text, but I really need this computer. Can you find a solution?