My experience has been much better with Fibaro’s compared to Aeon’s. For me both of these have been pretty much useless as far as outdoors though I haven’t played around with lowering the sensitivity. If you go through Fibaro’s manual, they do mention some false alerts will be there. May be positioning it in a different way will help.
I have simply stopped using the one outdoors for motion purposes. Using it only for Lux and Temp readings. Here’s an excerpt from their manual:
Actual range of the sensor can be influenced by environment
conditions. Should false motion alarms be reported, check for any
moving objects within the sensor’s detection area, such as trees
blowing in the wind, cars passing by, windmills. False motion alarms
may be caused by moving masses of air and heat as well. If the
device keeps on reporting false alarms, despite eliminating all of the
above-mentioned factors, install the device in another place.