1 files changed, 7 insertions, 12 deletions
diff --git a/src/fields/List.ts b/src/fields/List.ts
index 215dff34b..93a8d1d60 100644
--- a/src/fields/List.ts
+++ b/src/fields/List.ts
@@ -1,4 +1,4 @@
-import { action, observable, runInAction } from "mobx";
+import { action, observable } from "mobx";
 import { alias, list, serializable } from "serializr";
 import { DocServer } from "../client/DocServer";
 import { Scripting } from "../client/util/Scripting";
@@ -264,24 +264,19 @@ class ListImpl<T extends Field> extends ObjectField {
     // this requests all ProxyFields at the same time to avoid the overhead
     // of separate network requests and separate updates to the React dom.
     private __realFields() {
-        const waiting = this.__fields.filter(f => f instanceof ProxyField && f.promisedValue());
-        const promised = waiting.map(f => f instanceof ProxyField ? f.promisedValue() : "");
+        const promised = this.__fields.filter(f => f instanceof ProxyField && f.promisedValue()).map(f => ({ field: f as any, promisedFieldId: (f instanceof ProxyField) ? f.promisedValue() : "" }));
         // if we find any ProxyFields that don't have a current value, then
         // start the server request for all of them
         if (promised.length) {
-            const promise = DocServer.GetRefFields(promised);
+            const batchPromise = DocServer.GetRefFields(promised.map(p => p.promisedFieldId));
             // as soon as we get the fields from the server, set all the list values in one
             // action to generate one React dom update.
-            promise.then(fields => runInAction(() => {
-                waiting.map((w, i) => w instanceof ProxyField && w.setValue(fields[promised[i]]));
-            }));
+            batchPromise.then(pfields => promised.forEach(p => p.field.setValue(pfields[p.promisedFieldId])));
             // we also have to mark all lists items with this promise so that any calls to them
-            // will await the batch request.
-            // This counts on the handler for 'promise' in the call above being invoked before the
+            // will await the batch request and return the requested field value.
+            // This assumes the handler for 'promise' in the call above being invoked before the
             // handler for 'promise' in the lines below.
-            waiting.map((w, i) => {
-                w instanceof ProxyField && w.setPromise(promise.then(fields => fields[promised[i]]));
-            });
+            promised.forEach(p => p.field.setPromise(batchPromise.then(pfields => pfields[p.promisedFieldId])));
         }
         return this.__fields.map(toRealField);
     }