We use band steering on all of our SSID's without any (known) problems. I would highly recommend moving to a 25.X release though as the 25 branch brings a lot of nice stuff like AP client load balancing. We're currently using 25.3 without any (known) issues and it sounds like many others are using 25.5 successfully as well (we had an issue with SSID's not broadcasting with 25.5 on MR33's).
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