To me the only way to fix this is to not have the surround channels symmetric.
My room treatments are not symmetric, worked fantastic for me. See "Anthony Grimmani's acoustic recipe.
say you have a signal from 225 degrees on your left behind you. You can’t perceive a phantom center channel between them but that is how Atmos works
My room has a setup less than ideal for back surround speakers so I chose a specific speaker that uses a Harman proprietary technology (HST) to deal with it. It makes it seem like the entire back wall is a speaker in my room:
What do you think?
I can't say what will work for you. What worked for me was following the Dolby specs for speaker setup, measuring, treating my room, using a calibrated mic and upgraded audyssey for DSP, measuring, tweaking and listening, until it met or exceeded what I wanted (both objectively and subjectively). Now I just got that tip about top middle speaker placement from the Trinnov guide so I will tweak.