after upgrade the plugin, the old http plugin still exist and not using new one

[IzekChen]

• Version: logstash6.3.0-1
• Operating System: redhat

Currently we are facing the issue #61
I try to update the plugin with logstash-plugin
and it looks like this now

it didnt remove the old plugin folder and not using the new one.
Then I try to use "logstash-plugin remove logstash-input-http", then it shows not plugin available

[2018-07-18T17:25:32,529][ERROR][logstash.agent ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:cert_info, :exception=>"LogStash::PluginLoadingError", :message=>"Couldn't find any input plugin named 'http'. Are you sure this is correct? Trying to load the http input plugin resulted in this error: no such file to load -- logstash/inputs/http", :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:210:in lookup_pipeline_plugin'", "/usr/share/logstash/logstash-core/lib/logstash/plugin.rb:140:in lookup'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/plugin_factory.rb:89:in plugin'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:110:in plugin'", "(eval):8:in <eval>'", "org/jruby/RubyKernel.java:994:in eval'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:82:in initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:167:in initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:40:in execute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:305:in block in converge_state'"]}

[robbavey]

Can you run this command and tell me what the output is:

bin/logstash-plugin list --verbose | grep http

[IzekChen]

seems like something changed.
I do the update again and the problem just gone.
very weird.
But everything is fine now.