Revert "Fixed revert LoadBuffer implementation"

This reverts commit feb224f311963c424e210067869a116be3a438a1.
Revert "Restore LoadBuffer as a Queue"

This reverts commit ad1c470f94d3a8d11343458f277ab8ae0e374d7b.
Revert "Revert "Fixed revert LoadBuffer implementation""

This reverts commit 0fb7deb4ac3f7b8c859eb123d5d4dbc9d6138d6c.
Revert "Fixed revert LoadBuffer implementation"

This reverts commit feb224f311963c424e210067869a116be3a438a1.
Fix problem with LB min completion cycle