AE is pseudo 3D, more like 2D 1/2, but actually is still 2D – especially when you hit a POV that doesn’t see the layer.
It sounds like you’ve got a few things happening with rotation/orientation across one or more layers.
I suggest that you :
1) Duplicate the text layer
2) Offset its position by 1 pixel – it could be either of the X, Y, or Z property. It depends on the POV. Only you will know if it works by giving it a good eyeball.
Step 2 above will artificially give your text layer an extrusion effect so that it doesn’t disappear from view. If it looks decent, you may want to duplicate more layers and offset subsequent duplicates by 1 pixel from its ‘copy’.
Before you perform Step 2, you will want to select all the keyframes (if there are any) for the axis that you want to affect with the 1-pixel offset. This way, you will offset the layer for the duration of its entire path.
HTH
Roland Kahlenberg
broadcastGEMs
customizable animated backdrops with Adobe After Effects project files