With the release of firmware version 220.127.116.11_14639, we improved the accuracy of reporting of signal strength between the base station and cameras. The signal strength is the same as before, but we are now reporting it more accurately.
For best performance, make sure that your cameras have three or four bars of signal strength. The cameras can work when signal strength is at one or two bars, but they might go out of range intermittently due to fluctuations in the environment.
For more information about placing your Arlo cameras to optimize signal strength, visit How far can I place my Arlo Wire-Free or Arlo Pro Wire-Free cameras from the base station?