When should I update or re-pair smart glasses?
Use an update when its documented fix or required version applies, and use re-pairing when the product's recovery guidance calls for it. Record the original symptom first. Changing several things at once makes it hard to know what solved the problem.
Preserve a reproducible before-and-after
Note the glasses firmware, companion version and failing step, then make one supported change. Repeat the same small task afterward. If the problem disappears, you have a useful observation tied to that change instead of a vague impression that resetting helped.
Before any operation that removes local content, follow the manufacturer's preservation guidance. Re-pairing, restarting and factory resetting are not necessarily equivalent. Use the named procedure for the product and avoid treating the most disruptive action as the default first troubleshooting step.