If a module in a project has something like this then the skip is not seen (for both install and deploy plugins)
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<version>3.1.0</version>
<executions>
<execution>
<id>default-deploy</id>
<phase>deploy</phase>
<configuration>
<skip>true</skip>
</configuration>
</execution>
</executions>
</plugin>