Every time the door slams with the wind the plaster will crack
vertically over the brick/block joint. If there is wallpaper on it
then it will end up as a "crunchy-ripply-distorted mess" and will
eventually tear the wallpaper leaving a very visible & obvious
"crack". You then get people trying to fill in the crack without
addressing the real problem.

Realise this can happen on both sides of the wall - which could get
expensive if the other side is a wallpaper hallway.

So D-I-Y the repair properly - the wall starter kit is the proper
solution (or key in bricks since D-I-Y labour is "free").