Hello I've been using Fedora 26 LXQt and my experience with the new update manager dnfdragora has been poor bot on 64bit and 32bit to the point where i switched back to Yumex-dnf which is much more reliable.
Dnfdragora takes ages to open, and even longer to load updates. It also crashes when you open a rpm with some kind of qt error, i was unable to open RPMfusion with it. All this works fine on Yumex-dnf and more importantly i think, works quickly.
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Sent from my Android device with K-9 Mail. Please excuse my brevity.