Matlab function output changing when connected to conditional block

Hi all,

I am new matlab user and I am experiencing a weird problem that I've never faced when using other programming sofware such us python or labview. Here is the thing, I just wanted to do one determined thing every second being the discrete time 0.1s. For that purpose I just built a matlab function that calculates the remainder between the clock time and 1. If it is zero y=1 and else y=0. This works just fine (see attached 1). The minute I connect the function output to any conditional or comparator block, the output changes (see attached 2). why????

Thanks!!