As opposed to, for example stone, bee hives and nests throws items also in creative mode. Stone doesn't throw any item after breaking in creative mode.
Environment
Windows 10 1809
Integrated Java, also installed JDK 12.0.2 and 1.8.0_221
Launcher 2.1.5964
Thank you for your report!
We're actually already tracking this issue in MC-160457, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. Depending on the resolution, that can mean that it either will be fixed in the next version, or that it is not considered a bug and won't be fixed.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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