Problems with wifi roaming fix app

[spinoc...@gmail.com]

Hello, 

I have the wifi roaming fix app installed on a Samsung J5 (2016) with Android 6.0.1, but when I change the “Good signal level” setting (for example to -55 dbm), nothing changes. The default value stays the same (-65dbm). 

But even if I leave this setting as is, then the roaming doesn't work properly. When I move to another AP, it disconnect me from the first AP and, after like 5s, it connects me to another one.

The wifi has the same name, same password, different channels.