I am using the bootstrap theme and the Dialog component is not displaying correctly. After further investigation I found that the bootstrap theme CSS file is missing many of the .k-dialog styles. For comparison, the default theme has 22 .k-dialog styles and the bootstrap theme only has 15. The noticeable exclusions are the styles for the button groups and the title bar. I am currently using the latest version of the BS Theme (2.14.0). I attached an image of what I see.
I am going to just copy over the missing styles from the default theme but this is definitely not ideal as the color schemes are different so I'll have to figure that out as I go.