Image Compare — images don’t seem aligned

Hi there,

I’ve been experimenting with the image compare plugin on Jetpack and noticed that the before and after photos do not seem perfectly aligned when the slider is moved. I noticed it in my own photos (I double checked to ensure alignment etc.) as well as on the demo page here: https://jetpack.com/support/jetpack-blocks/image-compare-block/ (if you slide the slider quickly you notice the fire and tent ‘moving’).

Just wondering if this is a known issue and how to get around this? Thank you.