>>> You're acting like an Apple fanboy please stop.
Huh? Who said anything about Apple? Just trying to help you out since you are an Echo newbie doing something that no one else has mentioned doing, and getting problems.
One last idea, and then that's it.
You could be getting RFI. (If you don't know what that is, check Google). Have the BT speaker and Dot further apart if they are less than 3 feet or so apart..
Good luck.