I searched a bit more after replying to this thread and found a thread with the solution.
Read that post and the two below to find the answer.
Just to help a bit more; Here is the answer:
Can see in the display it is right on:
Imgix is built into bubble. No need for any plugin.
Just after inserting dynamic data reference select “More” to open another dynamic data choice box
Then when it opens the choices check the box to “Resize to fit dimensions by cropping”
Then you can have your circular photos look right