Only half of the thread displayed

Hi there!

After checking out couple of other thread-display-related threads on this forum, and sadly finding no help , I decided to ask here for assistance.

The problem is that after making a cut extrusion in a thread, only the half of it remains displayed, while the other half vanishes (see scr shots as reference).

I have these options on:

1. All Annotations:   View menu > All Annotations:     checked

2. Cosmetic Threads & shaded cosmetic threads:     both are checked

3. Display Annotations:   Right click on Annotations folder > Display Annotations:     checked

I tried open-closing, rebuilding, etc. but to no avail.

Thanks in advance for any hints

SolidworksDrawings And Detailing