Not if you get the decision made email, that would negate the hassle of waiting 3 weeks. My email from the home office saying that the visa was issued on August 3 seems to be out of the norm, so I imagine you’ll just get the decision email and won’t have to wait like I did.
Congratulations on getting the email
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I'll be honest, I don't think your decision was made on August 3rd at all. I may be wrong, but I think the decision was likely made today.
Normally they send out the decision made email within 1-2 hours of making the decision, and on rare occasions, it can take maybe 1-2 days from the decision being made. It's almost unheard of for a decision to be made weeks before the email is sent.
Personally, I would take whatever the 'contact hub' told your solicitor with a grain of salt. They are notorious for giving incorrect information, and this wouldn't be the first time they've told someone a decision had been made on their application when in actual fact, the application was still in line and hadn't even been looked at yet.