@adzter: Can you check to see if there is anything blocking the left earbud? To double check this, please remove the eartip from the left bud > Clean the sensor, mesh and eartip with a clean cloth > Clean the receiver with a cotton swab and dry brush to remove any foreign material > Reattach the eartip. Can you also open the Galaxy Wearables app, tap Find My Earbuds and select the magnifying glass symbol. Both buds will start beeping. Is the sound balanced in both earbuds? Please don't perform the above action while wearing the Buds, as the beeping can be quite loud.
For further troubleshooting steps, please refer to the link below. Let me know how you get on.