Copy and paste merged table cell doesn't work as expected.

Steps to Replicate

1. Create the 3x5 table and merge the second row:
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2. Place the cursor in the third column three and click on Copy column.
3. With the cursor in the third column three, click on Paste column left.

Expected Behaviour

The merge cell pasted in the correct place.

Actual Behaviour

The merge cell appear in the copied column: