This bug is relevant for all versions of openSUSE Leap, as well as for openSUSE
Tumbleweed.
The essence of the problem: I installed a clean system, updated, and then
installed, for example, wine. Then no other packages were installed. Just an
update. If you run wine removal right away, zypper will ask you to remove wine
and all its dependencies(75 packages in my case). So everything works fine for
a while.
BUT.
After a couple of days, a week or a maximum of two weeks, the removal of wine
with the key `-u' will start the removal of only three packages - wine-mono
wine-staging winetricks. The remaining 72 remain in the system and are not
displayed in unnecessary dependencies or anywhere else. 
Wine is used here only as an example. This situation is absolutely with any
package, even from official repositories, even from packman, even from
community repositories. And this is a really serious problem.