Can't move or transform layer without edit mask

[Brain2xml]

Hi!

Gimp 3.2.4

I added mask to layer. When I use any transform tools (move, rotate, scale etc) with mask selected icon everything works well, all affected to mask. But when I select layer icon all action affected on mask as well, even "Edit layer mask" unchecked

[rich2005]

Ok, I think I understand what you require.  

(1)Try and transform a layer with a layer mask and the mask is also transformed
(2) Split the mask from the layer by using a Layer Group with the mask attached to the Layer Group. (you can transfer with a copy / paste-and-anchor / delete-original)

   

Using United transform here, enable a composite preview lets you see what is happening overall.
If you want to, say move the whole layer + mask (as in 1) then just move the Layer Group instead.