Fixed bug with corrupted map state on token deletion

src/helpers/diff.js

@@ -1,8 +1,17 @@
 import { applyChange, revertChange, diff as deepDiff } from "deep-diff";
+import get from "lodash.get";
 
 export function applyChanges(target, changes) {
   for (let change of changes) {
-    applyChange(target, true, change);
+    if (change.path && (change.kind === "E" || change.kind === "A")) {
+      // If editing an object or array ensure that the value exists
+      const valid = get(target, change.path) !== undefined;
+      if (valid) {
+        applyChange(target, true, change);
+      }
+    } else {
+      applyChange(target, true, change);
+    }
   }
 }