Overlay DeSync from NBT Tag when entering a new dimensions.

I have seen other forums and haven't found anything that solves this, I'm making a fallout type mod and I created a custom helmet called Gas Mask.

The gas mask has a Number NBT Tag worth 5m in ticks (to give 5 min of radiation protection), and I have also a Overlay that shows how many minutes are left.

The problem is that when entering a new dimension, the Number NBT Tag maintains it's value, but the Overlay shows 0.0

Is this a bug? How can I fix this?

Thanks beforehand.