Fix issues when streaming or patching ReactiveData

panel/models/tabulator.ts

@@ -622,14 +622,16 @@ export class DataTabulatorView extends PanelHTMLBoxView {
   }
 
   addData(): void {
-    const rows = this.tabulator.rowManager.getRows();
+    const rows = this.tabulator.rowManager.getRows()
     const last_row = rows[rows.length-1]
 
-    let data = transform_cds_to_records(this.model.source, true);
-    this.tabulator.setData(data);
-    if (this.model.follow) {
+    if (!last_row)
+      return
+
+    let data = transform_cds_to_records(this.model.source, true)
+    this.tabulator.updateOrAddData(data)
+    if (this.model.follow)
       this.tabulator.scrollToRow((last_row.data._index || 0), "top", false);
-    }
     this.freezeRows()
     this.updateSelection()
   }
@@ -656,7 +658,8 @@ export class DataTabulatorView extends PanelHTMLBoxView {
 
   setMaxPage(): void {
     this.tabulator.setMaxPage(this.model.max_page)
-    this.tabulator.modules.page._setPageButtons()
+    if (this.tabulator.modules.page.pagesElement)
+      this.tabulator.modules.page._setPageButtons()
   }
 
   setPage(): void {

panel/reactive.py

@@ -700,6 +700,17 @@ def _patch(self, patch):
                 cb = partial(m.source.patch, patch)
                 doc.add_next_tick_callback(cb)
 
+    def _update_manual(self, *events):
+        """
+        Skip events triggered internally
+        """
+        processed_events = []
+        for e in events:
+            if e.name == self._data_params[0] and e.type == 'triggered' and self._updating:
+                continue
+            processed_events.append(e)
+        super()._update_manual(*processed_events)
+
     def stream(self, stream_value, rollover=None, reset_index=True):
         """
         Streams (appends) the `stream_value` provided to the existing