Can sensor show a strong signal but still be blocked?

[paindonthurt]

Amazon Alexa

Just as a side note on signal, I have one outside cam connected to and old Linksys 54g running dd-wrt from inside a metal building, and while the cam shows a signal strength of 96% from the 54g wifi, the 54g is only showing a 38% receive from that cam. So it looks like it would be easy to have a good enough signal to setup a cam, but at the same time not be able to view it.