High latency (ping) on every other packet

This morning I was troubleshooting some issues with out Aruba IAP105 access points (Dell branded). When attempting to ping either internal or external IPs I saw very strange behavior. Internally the first packet would have a latency of 1 or 2ms, the next over 900ms. This was perfectly regular and predictable, and external pings showed similar symptoms. Searching and searching and searching eventually yielded this link. Why yes, I was in fact running Metageek's inSSIDer tool in my troubleshooting attempts. Closing inSSIDer immediately fixed the high latency issue. I'm glad it only took me an hour of frantic searching to come up with this solution!