Calypso 2025 SP4 - CAD Entities Randomly Disappearing

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We've been seeing this consistently since upgrading to SP4. While working in the CAD window, surfaces, edges, or other entities will suddenly disappear for no apparent reason. Sometimes changing the view, rebuilding, or reopening the CAD model brings them back, but the issue keeps coming back.

A few things we've noticed:

• Happens on multiple parts and CAD models.
• Doesn't seem tied to any specific action.
• Missing entities are not actually deleted, just no longer displayed.
• Reopening the file may temporarily fix it.
• The issue is frequent enough that it's becoming a real frustration during programming.

At first, I thought it was something specific to a CAD file, but after seeing it across multiple jobs, it feels more like a bug in SP4.

Just wondering if others are seeing the same thing and if anyone has found a workaround or heard anything from ZEISS about a fix.