Prevent deleting scans while they are still being processed

It happens not-infrequently that after shooting a scan, I notice something that prompts me to reshoot it (reflections in mirror or other distractions), so I delete the scan. But often the Planix hasn’t finished doing its thing (merging/saving the HDR images I’d guess?) and deleting the scan results in the error below.

That locks up the interface. Clicking OK does nothing – that does not let you carry on. The only solution is to power off the Planix and restart. That’s lost productivity.

Can the interface please be smart enough to prevent deleting a scan while it’s still being processed?