Y axis jamming when moving rapidly

I am facing an issue shown in the video. I have cleaned the linear rails thoroughly, lubricated it with white lithium grease and am still facing the issue.
I think I notice, my right linear carriage has missing ball bearings, 1 on each side. Will that cause any issue? I did not lose any bearings while cleaning

I initially thought the belts were binding somewhere but if so why can the tool head still move left and right ?
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