This behavior just started out of the blue earlier in the day and I don't think I changed any settings that would bring it about.

 

I frequently copy/paste text from one cell to another in the "item" column (many of my cells here have identical test).  I often do 20 or more at a time.  When I paste the text, it is now inserting a tab space at the beginning of the text.  I have to go back and manually delete this space in each cell.

 

If I delete the space, then copy that cell, and paste it in another, it again inserts an extra space.

 

This only happens in the item column.  Other columns are fine.

 

Update: I did find a way to get it to work:  if I enter edit mode and manually select the text before copying, then the paste works correctly.  But the other method (right click the cell>copy>paste) is faster and always worked before.