power surges causing internet dropouts?
These adapters are using the electrical wire to transmit data over your power wiring. If there is excessive electrical noise surges or droops this can cause packet loss. Installing a whole house surge suppressor could eliminate surges droop is less common in my experiance and many times is caused by bad connections. Power line monitoring may be the only way to find out if it is the power line causing the problem or the quality of the adapters.