Has the working principal of a gradient mask changed in PS 2026 version 27.3?

In PS 2026 version 27.3 I can not use a gradient mask as before; if I create a gradient mask and want to adjust this mask by dragging the gradient handles, it does not change the original gradient, but adds a new gradient! In this way I can not make fine adjustments to a gradient mask. Is it a matter of a changed setting, or has the working principal of the feature changed?