diff --git a/app/graphql/resolvers/analytics/cycle_analytics/issue_count_resolver.rb b/app/graphql/resolvers/analytics/cycle_analytics/issue_count_resolver.rb
index 0fddaf6d634ee027ad45e88ed1f793c73b6586e4..7f6ff2944788c35ab01a20e0be11bd5e48a0fce0 100644
--- a/app/graphql/resolvers/analytics/cycle_analytics/issue_count_resolver.rb
+++ b/app/graphql/resolvers/analytics/cycle_analytics/issue_count_resolver.rb
@@ -22,7 +22,8 @@ def resolve(**args)
         private
 
         def process_params(params)
-          params[:assignee_username] = params.delete(:assignee_usernames) if params[:assignee_usernames].present?
+          assignees_value = params.delete(:assignee_usernames)
+          params[:assignee_username] = assignees_value if assignees_value.present?
           params[:label_name] = params.delete(:label_names) if params[:label_names]
           params[:created_after] = params.delete(:from)
           params[:created_before] = params.delete(:to)
diff --git a/ee/app/graphql/resolvers/analytics/cycle_analytics/concerns/issuable_stage_resolver.rb b/ee/app/graphql/resolvers/analytics/cycle_analytics/concerns/issuable_stage_resolver.rb
index c8fbf7d2ee02b8d01e220eb7d525240b263627f3..500967ffe3ac44c1a99ef895bbb9b11113c57e45 100644
--- a/ee/app/graphql/resolvers/analytics/cycle_analytics/concerns/issuable_stage_resolver.rb
+++ b/ee/app/graphql/resolvers/analytics/cycle_analytics/concerns/issuable_stage_resolver.rb
@@ -30,7 +30,6 @@ def authorized?(*)
 
           def process_params(params)
             params[:not] = normalize_params(params[:not].to_h) if params[:not]
-
             params = normalize_params(params)
             params[:projects] = params[:project_ids] if params[:project_ids]
             params[:use_aggregated_data_collector] = true
@@ -39,7 +38,8 @@ def process_params(params)
           end
 
           def normalize_params(params)
-            params[:assignee_username] = params.delete(:assignee_usernames) if params[:assignee_usernames].present?
+            assignees_value = params.delete(:assignee_usernames)
+            params[:assignee_username] = assignees_value if assignees_value.present?
             params[:label_name] = params.delete(:label_names) if params[:label_names]
             params
           end
diff --git a/ee/spec/support/analytics/cycle_analytics/flow_metrics_examples.rb b/ee/spec/support/analytics/cycle_analytics/flow_metrics_examples.rb
index a2b84d9821a656aaf4d9628ee48160975b6a249b..7edbe26773db4f63e418b8f9734e9bd884adaf8b 100644
--- a/ee/spec/support/analytics/cycle_analytics/flow_metrics_examples.rb
+++ b/ee/spec/support/analytics/cycle_analytics/flow_metrics_examples.rb
@@ -105,7 +105,7 @@
     let(:variables) do
       {
         path: full_path,
-        assignees: nil,
+        assigneeUsernames: nil,
         from: 21.days.ago.iso8601,
         to: 10.days.ago.iso8601
       }