S23 Ultra Starts charging when plugged in, then charging stops after a few seconds.

[ThomasdotNuke]

About 2 months ago, I noticed my S23 Ultra wasn't charging when I plugged it in. This lasted about an hour or so and then worked again. Eventually it stopped charging at all.
I had the charging port replaced 4 times. Each time plugging it into a charger would work for a dozen or so hours and then stop again. I would plug it in with a different charger or cable and get a notification that Fast Charge had started, only for the charging icon to disappear after 30 seconds. I've tried to clear cache partition, safe mode, and force restart and nothing seems to work. Sometimes it will work for a few hours, and then stop again.
I took it to a Samsung Mobile Authorized Repair Center, and of course the phone charged fine, even showed the correct voltage going to the phone, so we couldn't correctly diagnose at the time, because we couldn't replicate the issue.
Wireless and Fast Wireless charging has worked consistently, or I would have had to replace it immediately. I would really like to fix this, and I am open to suggestions.

[realaud]

I'd bring it back to the second repair place.

[Robin621k]

Just a heads up, when you reply to a comment, please press the reply button. This way the person who is trying to help will get a notification for follow-up questions.

[Tidbitty]

My port was dirty enough to not seat correctly. I thought I broke the port. I look in and notice a lint ball and removed it and have not had a problem since. From time to time I look to make sure I don't make another one lol

[realaud]

I don't know if you are aware, but they do make port plugs to keep your port clean and dry when not in use. They are cheap and these will thread through the holes on your case to remain attached.  If you are not using a case and have nothing to attach them to, you can just not put the loops on.

https://a.co/d/gQoze8j