[insteon] Fix scene channels not responding after modem db reload (#18464)

Signed-off-by: Jeremy Setton <jeremy.setton@gmail.com>

bundles/org.openhab.binding.insteon/src/main/java/org/openhab/binding/insteon/internal/handler/InsteonBaseThingHandler.java

@@ -317,6 +317,11 @@ public abstract class InsteonBaseThingHandler extends BaseThingHandler implement
                 .forEach(this::channelLinked);
     }
 
+    protected void unlinkChannels() {
+        getThing().getChannels().stream().map(Channel::getUID).filter(channelHandlers::containsKey)
+                .forEach(this::channelUnlinked);
+    }
+
     @Override
     public void refresh() {
         InsteonModem modem = getModem();

bundles/org.openhab.binding.insteon/src/main/java/org/openhab/binding/insteon/internal/handler/InsteonSceneHandler.java

@@ -131,6 +131,7 @@ public class InsteonSceneHandler extends InsteonBaseThingHandler {
         if (scene != null) {
             scene.setModem(null);
         }
+        unlinkChannels();
     }
 
     @Override