Removing incidentally created plane

[Spektre]

Hello. New users here.

I am using sketchup free and designing a bracket. All is well through the first legs shown here:

But when I add the next leg, an unwanted plane is incidentally formed (shown here in dark gray.

I haven’t had any luck removing this plane. I can raise or lower it, but not delete it. Would appreciate it if someone can tell me how.

Thank you in advance.

[DaveR]

What happens if you select that face and hit Delete?

[Spektre]

Well…It disappears exactly as it should despite having tried this half a dozen times previously.

Thanks (facepalm)