Standing Shows Obstructing Guests Using Wheelchairs?

Hi, all! We had Sammy Hagar last night and an interesting topic came up and I would LOVE your input.
Background: Classic rock concert. Most everyone in the audience was standing. The exception - guests using wheelchairs or mobility assistance devices who were unable to stand.
Today we received an email from a guest who uses a wheelchair saying that the seats they purchased were not noted as obstructed view (true), but because of everyone standing, they could not see because they were physically unable to stand.
Our accessible seating is fully integrated with traditional orchestra seating in our continental style venue, so we don't have the option to move guests using wheelchairs to another area to improve their line of sight.
With that, do you or your venues have verbiage that you use to address standing and potential obstructions for concerts?
ALSO - Shannon and I are finalizing a new date for our next meeting. I want to thank everyone again for your flexibility and understanding as we worked around a last minute emergency. You're truly the best!