I've had this bug a few times in the past.

Sometimes, opening the Elements List I can't see the fist column before the From Node column. This column is used to select a complete line (i.e. element). I therefore can't select multiple elements to do block operations on.

Unpinning and moving the Elements List window does not help. Is there a fix to this ?



edit: image link to view in higher res
https://i.imgur.com/hAc1EgN.png