Not a bug as such but can be an annoyance.
Gimp 3 has layer effects - that fx you see in the layers dock. That is a sort of invisible layer which lets you see what effect the tool will make without affecting the layer itself. It also allows going back and make corrections if the user does not like the effect.
see: https://docs.gimp.org/3.0/en/gimp-using-...fects.html
Two ways to get what you want
(1) Enable Merge filter in the tool dialogue.
or
(2) Click on the fx in the layer and there are options to apply - delete - hide.....
Gimp 3 has layer effects - that fx you see in the layers dock. That is a sort of invisible layer which lets you see what effect the tool will make without affecting the layer itself. It also allows going back and make corrections if the user does not like the effect.
see: https://docs.gimp.org/3.0/en/gimp-using-...fects.html
Two ways to get what you want
(1) Enable Merge filter in the tool dialogue.
or
(2) Click on the fx in the layer and there are options to apply - delete - hide.....