`INFO cannot auto connect core:x11` on upgrading to Core 2.27.4

$ sudo snap refresh core --candidate
2017-08-28T17:46:29+01:00 INFO cannot auto connect core:x11 (slot auto-connection), candidates found: "corebird:x11, musescore:x11, discord:x11, play0ad:x11"
core (candidate) 16-2.27.4 from 'canonical' refreshed

I know it’s just an info message, not an error, but why do I need to know this? I tried snap run musescore after upgrading and it worked fine…

you dont need to know that and it should be fixed for versions after 2.27 (i think @zyga-snapd quietened it for 2.27 and later)