Try defining the tangent input via the tangent node:

The axes should be the axes around which you want the radial "bands" to radiate from.

It probably was working fine until you applied the scale to the objects. By default the tangent uses the object's local Z axis. When the scale is applied

If you rotate the object -90° in edit mode, then rotate it back 90° in object mode, so that the object's local Z points out from the center of the disk:

Then it will work with the default tangent:

Try defining an axis for the tangent input with a tangent node:

In other words, for the effect in your first screenshot, it should be the axis perpendicular with the flat front of the object.

Note that the tangent node uses local coordinates.

It probably was working fine until you applied the scale to the objects. By default the tangent uses the object's local Z axis. When the scale is applied, the object's local Z was aligned with the global Z (which is not perpendicular to the "front" of your object).

For example, if you rotate the object -90° in edit mode then rotate it back 90° in object mode so that the object's local Z points out from the center of the disk:

Then it will work with the default tangent: