Logitech bluetooth problems after recent update

After recent update, I encounter bluetooth connecting problem when using my logitech keyboard and mouse. I’m using KDE.

Before the update, I can just pair with the devices normally using the system bluetooth setting panel, and everything goes well. After the update, I can’t pair the the devices any more. After some trials, I found I must trust the devices first (which can’t be done with the system panel and I use blueman), then the devices can be paired successfully.

Even worse, if I turn off the bluetooth and turn on again, the devices can’t connect to the PC any more. I must pair them with the PC manually again, which is quite annoying.

I also try some bluetooth deviced not produced by Logitech, they seem to work well.