Hud Attachments Dissappear, but not

Has anyone had any issues with HUD attachments being invisible when you log in, or tp to another location?

The buttons are still there, and if you touch them...they will show up....so ????

That's usually a packet loss thing, can also just be a busy area that takes a while to rez. HUD attachments are just prims so they get affected the same way. Logging in and teleporting are especially loss-prone times since you're getting streamed a bunch of objects that weren't in view before. Sometimes you may see that things like prim hair are missing chunks, it's the same problem. As you've already noticed, something that forces an update like interacting with the object, or editing, or even jogging the camera around, will trigger an update and the sim will tell your viewer what it's missing.