Acu-Rite 01025 and 5in1 LOS

Hello, Has anyone had problems with LOS between the Acu-Rite 01025 and the 5in1 sensor?
Every now and then I get total LOS for about five minutes and the Full AOS will come back
The LOS will always last for about 4 to 5 minutes every time it happens
The next question is due to the pattern of the event is it interference from other RF on 433 MHz? But why five minutes each time?
I do have an electric company smart meter that uses RF in the 900 MHz range. So I’m not convinced that it is causing a problem.
I have not been able to figure out what is causing this. Other wise I have a full scale signal strength
On the 01025 at all times as the two units are only about 20 to 30 feet away from each other.
…Joel