DeviceList NEVER refreshes

Hello everyone.
I am using the "BluetoothLE1-->DeviceList" property to display a list of nearby BLE devices. But the set of BLE devices that I have to detect is changing, they are not the same at all times but there may be some that turn off or move away and others that appear.
The problem is that the "DeviceList" is not updated. For example, if at some point it found the "MICASA" device, it continues to display it even if it is turned off or out of range.
How can I remedy this?
Thank you so much.