If you go to Google and search for [random number generator] you will be given a box at the top to generate that number. If you try to share that URL to that search result using the share buttons, Google will not take you to that page but instead will take you to a query for [metronome].
Here is a screen shot:
However, the metronome query share URL doesn't take you to the random number generator, so it is just an errore on the other end.
Danny Sullivan of Google is aware of the issue and is escalating it to be fixed.
How random. :)Ah, I see. Yeah, I'll pass that on.— Danny Sullivan (@dannysullivan) February 20, 2018
Forum discussion at Twitter.