Negative values in TexCoord goes black, how to prevent without resorting to Abs?

So, in UE3, you could do this:
image

When you do the same in UE4/UE5, you get this:
image

The only way to “fix” it, is by immediately adding an Abs behind it:
image

This sucks, as every time the TexCoord could potentially go negative (eg. parameters coming from a Material Instance), I have to compensate using an Abs.

Is there any way to restore the UE3 TexCoord behavior?

You could always just set a 0 minimum for the parameter?

I may be mistaken but afaik there’s no way to do what you want without abs.