We tried to use "ng-repeat" inside a tooltip's template.
That did not work and we needed a while to find out that the template specified via "tooltip-template" seems to not get compiled.
When we switched to "tooltip-template-url", we at first got 404s when the app tried to load that single template. Our build system uses grunt-angular-templates to put all template in a single js file that pre-populates the template cache.
Only after we copied all "*-tooltip-template.html" to the output build did it started to work (including the "ng-repeat").

So please check if any templateUrl is present in the cache already and only load it if it isn't found there (and then fill the cache after loading).