Thnx a lot for this information 
Unfortunately on this side everthing seems to fine; but I’ll take a look next time I expierience any slowness.
Update: Just again have a reproduceable slow UI when accessing notifcation rules. I then disabled the remote-site access with liveproxy and suddenly all performance issues where gone 
But I wonder what could be tuned with that liveproxy since it always displayed all channels ready 
@righter maybe you could check this too