diff --git a/src/calltree.js b/src/calltree.js
index 46d4262..a3dfce7 100644
--- a/src/calltree.js
+++ b/src/calltree.js
@@ -769,6 +769,9 @@ const select_arguments = (state, with_focus = true) => {
 }
 
 const navigate_logs_increment = (state, increment) => {
+  if(state.logs.logs.length == 0) {
+    return {state}
+  }
   const index = 
     Math.max(
       Math.min(
diff --git a/src/editor/logs.js b/src/editor/logs.js
index 86c2637..4558818 100644
--- a/src/editor/logs.js
+++ b/src/editor/logs.js
@@ -73,7 +73,7 @@ export class Logs {
     }
 
     if(prev_logs?.log_position != logs.log_position) {
-      if(prev_logs?.log_position != null) {
+      if(prev_logs?.logs == logs.logs && prev_logs?.log_position != null) {
         this.el.children[prev_logs.log_position].classList.remove('active')
       }
       if(logs.log_position != null) {