Received CP05 Letter After Amended Return - Avoided $5,000 Frivolous Filing Penalty But Now Under "Further Examination" - Anyone Still Get Their Refund?

Filed my return in February and had to amend in June. Just got a CP05 letter and I'm completely lost. Starting to lose hope about getting my refund. So here's the situation. I filed my original return back in February, but then realized I needed to make some changes so I submitted an amended return in June. I just received a CP05 letter from the IRS dated July 1, 2024, acknowledging my response from June 30, 2024. The letter states: "Thank you for your response of June 30, 2024. We're sending your response, dated June 30, 2024, to the office at the address at the end of this letter because: Your amended return corrected your frivolous position; therefore, you will not be assessed the $5,100.00 frivolous filing penalty. However, your amended return included other changes which require further examination. You will be contacted if additional information is needed to process your case." I'm not sure what "frivolous position" they're referring to, but apparently my amended return fixed that issue. But now they're saying my other changes need "further examination" which sounds like more delays. The letter also mentions: "Find tax forms or publications by visiting IRS.gov/forms or calling 800-TAX-FORM (800-829-3676). If you have questions, you can call 866-883-0235. If you prefer, you can write to the address at the top of the first page of this letter. When you write, include a copy of this letter, and write your telephone number and the hours - can reach you. Keep a copy of this letter for your records. Thank you for your cooperation." Has anyone else received this verification letter and still eventually received their refund? How much longer should I expect to wait? I'm really starting to lose hope about ever seeing my money.