While everyone else is watching Eurovision now, I've just updated to the new Resilio Sync 2.5.0 on Android 6.0. Generally it is better, but there is one serious issue which I will describe here.
Before the update, there was only one persistent notification (like the bottom one on the screenshot attached: "Sync: Working"), which was hidden on the lockscreen and had no additional buttons. That was fine.
Now, there are two notifications: the previous one plus the one with buttons ("Sync: Idle - Exit & Sleep now"). Both are displayed at the same time and both are persistent, but the one with buttons is also displayed on the lockscreen.
By the way, changing the setting "Use notifications" (#3 here, I mean) has no effect on displaying notifications - both are also displayed.
I believe that two notifications are too many for one app