Yes. This is...oh no...a bug.
When "other location" is originally entered on an event, and information is typed in the "fill in the location below" field, and the event is saved:
If you later re-edit, and change "other Location" to a building and select a resource (room) and re-save,
Then the display "pop-up" when you click the event on month view, displays the original value you typed for "other location," instead of displaying the new building resource you changed it to. However, examining the event by choosing to edit it again, shows the new building resource is correctly displayed for the event, but the pop-up will not change to the correct resource.
In my limited trials, saving an event with no location selected, and then editing it to include a location and resource works correctly. I also discovered that you don't need to delete it and re-enter the event again to get a correct display. Edit your event and change the location first to "no location," and save it. Then re-edit it and change to the correct location and room. While still a big hassle, not quite as big as re-entering your whole event.
"A soft answer turneth away wrath" works great on LDSTech forum boards!