How does MLeader left align works?

Symptoms

When drawing an MLeader that has a source block as reference, it is not properly left aligned.

Note: This happens only when the Attachment option of the Mleader Style is set to Insertion point.

Cause

If an intersection point (2) cannot be found for the source block, then the insertion point (1) of the block is used.

Solution

Modify the block reference to have an intersection point (2) that is used to align the MLeader to the left.

Note: Make sure the extra line is placed on a No Print layer.