Z-Wave JS 15.32.1 lets applications request firmware updates from the update service for several devices in one pass. Previously, asking to update a sleeping device reserved the network-wide slot until that device woke up and finished. The next request could fail even when it targeted a different device.
The driver also reports whether the device being checked has an update in progress. It still refuses a second update for the same device and protects the controller while its own firmware is being updated.