Index: src/org/openstreetmap/josm/gui/tagging/presets/items/Combo.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/org/openstreetmap/josm/gui/tagging/presets/items/Combo.java	(revision 15871)
+++ src/org/openstreetmap/josm/gui/tagging/presets/items/Combo.java	(date 1582011627312)
@@ -51,8 +51,9 @@
         combobox = new JosmComboBox<>(lhm.values().toArray(new PresetListEntry[lhm.size()]));
         component = combobox;
         combobox.setRenderer(getListCellRenderer());
-        combobox.setEditable(editable);
+        combobox.setEditable(true);
         combobox.reinitialize(lhm.values());
+        combobox.setEditable(editable);
         AutoCompletingTextField tf = new AutoCompletingTextField();
         initAutoCompletionField(tf, key);
         if (Config.getPref().getBoolean("taggingpreset.display-keys-as-hint", true)) {