diff --git a/js/planner.js b/js/planner.js
index 273e078..5db6c43 100644
--- a/js/planner.js
+++ b/js/planner.js
@@ -836,7 +836,9 @@ function layoutBossActions(mechanics, duration) {
 }
 
 function assignmentWindowMs(assignment) {
-    return Math.max(1, assignmentDurationSeconds(assignment)) * 1000;
+    const durationMs  = Math.max(1, assignmentDurationSeconds(assignment)) * 1000;
+    const cooldownMs  = assignmentCooldownSeconds(assignment) * 1000;
+    return Math.max(durationMs, cooldownMs);
 }
 
 function sameAssignmentRef(mechanic, assignment, ref) {
@@ -847,7 +849,9 @@ function sameAssignmentRef(mechanic, assignment, ref) {
 }
 
 function assignmentOverlapsJob(plan, job, ability, timestamp, ignore = null, candidate = null) {
-    const candidateWindow = Math.max(candidate ? assignmentDurationSeconds(candidate) : 0, 1) * 1000;
+    const candidateDurationMs  = Math.max(candidate ? assignmentDurationSeconds(candidate) : 0, 1) * 1000;
+    const candidateCooldownMs  = candidate ? assignmentCooldownSeconds(candidate) * 1000 : 0;
+    const candidateWindow      = Math.max(candidateDurationMs, candidateCooldownMs);
     const candidateStart = Math.max(0, timestamp);
     const candidateEnd = candidateStart + candidateWindow;
     const ignoredActivation = assignmentEntryForRef(plan, ignore);