Certainly not. If there's no outward sign of overheating then it still needs replacing, but it's probably OK to keep using it in the meanwhile, but I wouldn't leave it on overnight or if you're out of the house for extended periods.
Forum staff will respond in due course, but they're a tad stretched at the moment. But probably still as quick to get you a replacement as if you endure the misery of trying to telephone it in (not to mention, as it's "off-script", there's a chance the agent will tell you that it's fine, and nothing needs to be done).
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Welcome to the forum and thank you for taking the time to post.
I am sorry to hear that you are having issues with your hub. As advised previously we are going to need to replace the hub. I have taken this opportunity to book this for you, It will be with you in the next 3-5 business days.