Conflicting ContravariantShow for ZoneOffset

It seems my instances for ZoneId and ZoneOffset are slightly broken. When importing io.chrisdavenport.cats.time.instances.all._, I get a conflict when trying to show a ZoneOffset:

scala> show"${ZoneOffset.UTC}"
<console>:22: error: type mismatch;
 found   : java.time.ZoneOffset
 required: cats.Show.Shown
       show"${ZoneOffset.UTC}"
                         ^

This arises because there are two overlapping instances for ContravariantShow[-T]:

scala> Show.Shown.mat(ZoneOffset.UTC)
<console>:22: error: ambiguous implicit values:
 both value zoneidInstances in trait zoneid of type => cats.Show[java.time.ZoneId] with cats.Eq[java.time.ZoneId] with cats.Hash[java.time.ZoneId]
 and value zoneoffsetInstances in trait zoneoffset of type => cats.Show[java.time.ZoneOffset] with cats.Order[java.time.ZoneOffset] with cats.Hash[java.time.ZoneOffset]
 match expected type cats.Show.ContravariantShow[java.time.ZoneOffset]
       Show.Shown.mat(ZoneOffset.UTC)
                     ^

, and the compiler can't choose a better one.

I'm not sure what would be the best course of action here. Removing Show[ZoneOffset] would fix interpolation, however most of generic code I've seen relies directly on Show!

Start with the instances exported by io.chrisdavenport.cats.time.instances.all._ and the ZoneId/ZoneOffset definitions; reproduce the ambiguity with Show.Shown.mat(ZoneOffset.UTC). Trace the two ContravariantShow candidates and determine an instance design that preserves generic Show use while making interpolation compile. Done means the reproduction compiles without an ambiguous implicit.