diff --git a/app/models/scheduler.rb b/app/models/scheduler.rb
index 9b4c17c93..ea05234b8 100644
--- a/app/models/scheduler.rb
+++ b/app/models/scheduler.rb
@@ -245,6 +245,7 @@ class Scheduler < ApplicationModel
 
     # restart job again
     if try_run_max > try_count
+      sleep(try_count) # wait between retries (see https://github.com/zammad/zammad/issues/1950)
       _start_job(job, try_count, try_run_time)
     else
       # release thread lock and remove thread handle