How do you hide cooldown text?

[galvin]

How do you hide the built in cooldown text.
I use the cooldownframe template.

I just want my addon to hide the text, since I have my own text showing the cooldown.

EDIT: found it CooldownFrame:SetHideCountdownNumbers(true or false)

This setting stops working once you resize the cooldown frame. I have no idea how to work around this.
Changing the UI scale in the blizzard settings has the same effect, reporting this as a bug in the forums.