Infinite loading in persisted data

When we want to see the result of the execution of a component, it loads something infinitely.
It happens when the result of the execution of the component is "undefined".
Might be happening because of the data fragmentation, because of a try/catch bloc too invasive.
We have to check if any exception is raised during the infinite loading.

I can't seem to reproduce the problem in local even when forcing a component to return "undefined" from the code.
However, a ":" appears before giving the result.