Issue implementing WindowButtonDownFnc to a single plot/image

I'm currently using the App Designer; my aim is to get pixel data (from a left mouse button click) from an image designated in a single UIAxes object (ImageAxes), and display the data in another UIAxes object (PixelAxes). To give a bit more context, each pixel of the image corresponds to a specific RAMAN spectra.

My issue is that even though I specify the 'CurrentPoint' coordinates to be taken from JUST ImageAxes; whenever I click on another plot, the displayed spectra changes. In other words, the CurrentPoint property applies to ALL of the axes rather than a single one. What I've done so far is given down below. I tried to implement a line from the answer here.

function ImageAxesWindowButtonDown(app, event)
            if ~isempty(event.Source.CurrentObject) && isequal(event.Source.CurrentObject.Tag, 'imageAxTag')
                temp = app.ImageAxes.CurrentPoint;
                xy = [temp(1,1) temp(1, 2)]; xySum = round(sum(xy));
                plot(app.PixelAxes, app.shift_lambda, app.finalDataNormalized(:, xySum))
            end
        end

Could it be because I did not designate the tag properly?

[Mohammad Sami]

you can perhaps try isequal(event.Source.CurrentObject,app.ImageAxes)

[Ahmet Alper Özkan]

Tried this, unfortunately did not work.