QGIS » QGIS Application

With DB Manager in QGIS 3.6 when I try to rename a column through the DB Manager GUI (Table --> Edit table --> Edit column), it seems that DB Manager is also trying to add a comment (I had the comment field empty) but with the old name:

So e.g. I tried to rename column field_2 to long in table foo.bar

Here's the query that it tries to run:
COMMENT ON COLUMN foo.bar.field_2 is ''

This is the error that it throws:
column "field_2" of relation "fool.bar" does not exist

So I guess a fix for this would be not to try to add a comment if the comment field is empty and also make the commented field to be the new one.