Follow 플러그인을 제거했지만 문제가 여전히 남아 있습니다. Rails 로그에서 다음 내용을 확인했습니다:
Started PUT "/review/6793/perform/reject_user_block?version=0" for xx.xx.xx.xx at 2020-09-03 09:45:48 +0000
Processing by ReviewablesController#perform as */*
Parameters: {"version"=>"0", "reviewable_id"=>"6793", "action_id"=>"reject_user_block"}
Job exception: undefined method `strip' for nil:NilClass
Rendering text template
Rendered text template (Duration: 0.0ms | Allocations: 1)
Started GET "/t/global-variables/331828" for xx.xx.xx.xx at 2020-09-03 09:45:48 +0000
Processing by TopicsController#show as HTML
Parameters: {"slug"=>"global-variables", "topic_id"=>"331828"}
Completed 404 Not Found in 292ms (ActiveRecord: 0.0ms | Allocations: 124598)
ActiveRecord::RecordNotFound (Couldn't find all Topics with 'id': (1185852, 1185853, 1186324, 1186929, 1191089) [WHERE ("topics"."deleted_at" IS NULL)] (found 4 results, but was looking for 5).)
lib/plugin/instance.rb:393:in `block in on'
lib/discourse_event.rb:14:in `block in trigger'
lib/discourse_event.rb:13:in `trigger'
app/models/user.rb:1567:in `trigger_user_destroyed_event'
app/models/reviewable.rb:353:in `perform'
app/controllers/reviewables_controller.rb:192:in `perform'
app/controllers/application_controller.rb:340:in `block in with_resolved_locale'
app/controllers/application_controller.rb:340:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:336:in `call'
config/initializers/008-rack-cors.rb:25:in `call'
config/initializers/100-quiet_logger.rb:23:in `call'
config/initializers/100-silence_logger.rb:31:in `call'
lib/middleware/enforce_hostname.rb:22:in `call'
lib/middleware/request_tracker.rb:176:in `call'
ActiveRecord::RecordNotFound 라인은 리뷰 큐에서 사용자를 삭제하려고 할 때마다 항상 나타나며, 정확히 동일한 토픽 ID와 함께 표시됩니다.
해당 토픽 ID를 확인해 보니, 모두 Events 플러그인을 사용하는 게시물들이었습니다. 그리고 실제로 그중 하나는 삭제된 상태였습니다. 그런데 리뷰 큐의 이 동작이 왜 이러한 항목들을 확인하는지 궁금합니다.
@merefield 다시 도움을 요청하게 되어 죄송합니다 
수정: 플러그인 링크를 변경했습니다