My parts are disappearing whenever unioned

[Lv100DominusUltimus (Dominus)]

Feedback

I highly suggest viewing other topics about this.

How to recover invisible / corrupt unions

Introduction This tutorial will walk you through finding and recovering your unions if they get lost / corrupted / turn invisible. This method relies on trial-and-error, and works best if tried immediately after you’ve lost a union. Background Information When a union is created but before it or its place is saved, it contains child data - information about what it’s made of, stored directly in the place. When the union is saved to Roblox, a new SolidModel asset is created. The union instanc…

@XAXA

Try turning this setting on Reload Assets in the settings and then restart all instances of Roblox Studio: