Stop running speed tests back to back. I consulted with a rural isp in TX about interference issues they were having. Yes, they had rf interference(from their own towers) but the largest problem was being oversold. Too many customers associated with each cell and the 1st thing they did when service slowed was run a metric shit ton of speed tests. This would drag down customers with more stable connections, and they would start speed testing. Thus begins cascading failures. Cell crashes, switch crashes, PED crashes, then the effin adtrain would go down taking the entire network with it. We supported EMS for that rural county and they could not dispatch ambulances when down. So technically, speed tests have killed people. A speed test essentially red lines your connection, which is fine, but 1000 people doing it non stop for hours on end is good for nothing other than a system stress test. If your car crashes, hopefully your 1st instinct is not put a brick on the gas pedal.

Also: not saying ookla is responsible for service issues, just that you shouldn't repetitively test during peak hours, outages, or other service interruptions.