Umpqua Bank

On Saturday 11/2/2019 I went to the Umpqua Bank branch in Burien Wa. I have been a customer/account holder for 7 years now. I on a regular basis cash my boyfriends checks through my account (mind you they are State of Washington checks from L & I). I have even cashed them there at that very atm on nemours occasions and never had a problem. I used to live 2 mins from that very bank, but since my move I have been using a different location that isn't open on weekends.
As far as I know the only requirement of a third party check, is that person be there with you. Not that this should matter, but it was clearly the motive behind this treatment, i am white and my boyfriend is black. The following are the events that took place:
We walk in and are asked to sit at the desk up by the counter where the tellers are and sit down. Immediately following me pulling the checks out and stating what we are there for, the lady tells me that they don't do 3rd party checks. I said, "that's bull because I do it, and have done it on a regular basis for years. She goes on to say they don't TYPICALLY do 3rd party checks continues to insist that they just don't do it. I told her, "yes you do, I've deposited them at their atm outside the branch on many occasions." (The next statement she made is what led me to believe it was racially motivated) she says and i quote, "well yeah we can't see who it is at the atm."
Than asks for my info so she can see my account. At the time i had no balance, but my paycheck from the Seattle Police Department is directly deposited into that account every other week, and I have a lot of checks and transactions in my account on a very regular basis and never once have they ever been returned or left me with negative balance. I have a history of positive account balances, and have had the account for a long time and never have I defaulted or gave them a reason to treat me that way.
The assistant manager's name was Stacey Reed and the manager was Linda, didn't get a last name. Back to what happened... So she looks at my account and assures me that they won't cash it especially because i have no balance, at which time I remind her that my direct deposit goes into that account and there will be a balance and she continues to insist that, totally dismissing what I am saying to her. She then insists that if the Kent branch is doing this for me that they must be making an exception.
At the Kent branch they are extremely nice and helpful and never batted an eye when we have done this exact same thing in the past. The overall feel and vibe sent off was horrible. After we left, i called the 800 number just to find out if that is indeed a policy or procedure that is new and i wasn't aware of, or if it was not true at all. Given the fact that literally less than a month ago we had just done so at the Kent branch, i knew this wasn't the case. The gentleman that helped me confirmed that as long as the person is with you and you have an account, yes, they should be able to cash the check, just like I thought.
As far as a resolution, I would like at the very least for these "managers" to be reprimanded and I'm not sure what would be reasonable resolution but there definitely needs to be one. I was left with a really bad taste in my mouth (for lack of better term), and am questioning whether or not i want to continue banking here. If it wasn't for my usual branch I it wouldn't bother me a bit closing my account because what is the point of having a long time good standing account with your bank if your not able to make these types of transactions? Not sure what other info you might need but just in case my name is Malina M Brown dob: 7/6/1983 account ending in 2467. My phone number is [protected]. My email is [protected]@gmail.com. My physical address is 20044 104th PL SE KENT WA 98031. Please contact me via any of the above for any further questions. Thank You