I have already bought 2 of these connectors Gardena, many years ago. These have long served us well and were always tight. I never had any problems. Unfortunately, the two connector parts was from the garden shed of the hose incl. Stolen. I do not know why you're doing something ...
Have mounted over the weekend to a new hose connections. As usual, without any problem.
I am very happy with the product and can recommend this without hesitation.