ContentByLabel macro sometimes give: "Error rendering macro 'contentbylabel' : null"

Sometimes the macro contentbylabel give this error:
Error rendering macro 'contentbylabel' : null

When refreshing the page mostly it work again. Recently i also found this bug on your own documentation of this macro, see the attachment. Found this on the following page:
https://confluence.atlassian.com/x/njgC

In our setup we get those errors very often because we use a lot of the contentbylabel macro's.

Hopefully there is a way to fix this?