problems with innerHTML

I have a weird issue whenever I try to use the innerHTML function in an embedded block. The function does not seem to work properly when multiple blocks are embedded on the same page. Multiple blocks all display the same image even if the code is different. I don't believe this is a coding issue on my end because if I replace innerHTML with textContent, the data pulls correctly.

Anyone else have this issue?

Images have been attached for clarity. This is the exact same JS, but one uses getElementByID('element').textContent, and the other uses getElementByID('element').innerHTML
You can see that the textcontent pull has different data while the innerHTML returns identical data.