Ensure you use the correct channel width for your network considering your wireless environment.
WiFi channels are each allotted a 20 MHz segment in the frequency band they're in, and can also be bonded together to form wider segments. The width of a WiFi channel dictates how much data can pass through and at what speed, where the wider channels are usually associated with more data transferred at faster speeds.
Use WiFi Scanner to determine the channel width of your network.
The dashboard offers the ability to set a default channel width, which will be factored into the Auto Channel algorithm for 5GHz. A default setting of 80 MHz width can be configured to allow for optimal wireless throughput. However, using an 80Mhz width may cause more co-channel contention. The setting may be reduced to 40 or 20 MHz to reduce channel overlap in high-density deployments. The default channel width can be specified on the radio settings page in the dashboard. The width may be set differently on a per-AP basis either using the overrides by selecting an AP or by opting to use Auto.