Existing door chime doesn't work after putting in battery

Hi! My existing door chime works just fine when I press my Doorbell 3 without battery in it, but as soon as I put it in, my existing door chime stops working. The chime works again as soon as I take out the battery. My notifications and everything work perfectly through our phones and Alexa, it just bugs me my existing chime doesn't work, a little help here please! Thanks!