Numeric label dose not show value sometimes

We encountered a strange problem. We used some Numeric label components in vision display and found that these components can display data normally in Desginer, but in the runtime environment, they randomly do not display values. Does anyone know what is causing this? and how was it resolved?
Ignition version is 8.1.26

The designer naturally has more privileges than a real client, which is why the designer has a "preview" for visuals, not for all functionality. You will need to share more details about the components that are misbehaving, and what data they are supposed to be showing, and how all of those items' security is set up. If you cannot share here, consider opening a support ticket for IA to look over your shoulder.

I doubt the problem is truly random.