No audio in right channel.

All of a sudden my right channel wont play. Project plays fine in Standard version 2024. I notice a little number 1, 2 or letter L, or R. on the audio clip itself. Only the clips with 1 or 2 wont play. Ive tried modify clips and all other tricks and it wont play. Even created a bars and tone and it wont play right channel. tried resetting preferences but nothing worked.in the corner of the audio clip on timeline.