Update: We tracked the issue down with Meredith's file to the default metric dimension styles and multileader styles.
In dimstyle, this break gap size can be increased in the Symbols and Arrows tab.
In mleaderstyle, this break gap size can be increased in the Leader Format tab.
An increase to 3.175 will match the break gap size of our default imperial styles (0.125").
We're updating all tools that create our mleader styles to solve this issue and have this 3.175 size for metric drawings (instead of the 0.125 size it had before). This will be available in the next update.
Fixing the default metric dimension style will take a some more time but is in progress.
These can be updated manually in the affected dimstyle in the meantime.
-Amanda