defo not master cylinder that was checked. It’s not dangerous atall just happens every now and then. Wondering if anyone else had same problem

Hi members I’m new to group here. I’m wanting to put my freelander up for sale but I need to look at a problem first with the breaks. I have dealt with it for the past few years but I don’t want to sell it like this. So my breaks work fine when hitting them for the first and second time but if...