It doesn't look like it's dying to me either, far from it. But if it seems less healthy than before, it might be. The description of new foliage turning brown is concerning. It's normal for the oldest leaf to be lost at about the same pace as a new leaf is formed.
If it's been in the same soil for a while, repotting usually helps too.
TY, Jean. Totally agree, any pot needs to have a hole in the bottom!