(Essential Graphics) MOGRT box with Responsive size on keyframe

Hello,

I have a very specific issue for an mogrt animation.

So i have a box that grow horizontally, then a text appear in it.

I need to have that box growing at the same size than my text (So First key frame will always be the same, but the last one will change).

I can do it in after effect with the Essential Graphics panel but as soon i export in mogrt to use in premiere, the growing animation don't happend. The box just stay at the final size, removing the growing part.

Is there a way to make it in y way to keep that growing animation ?

Thanks !