Thanks for the reply.
I rebooted, re-started the array (which restarted the array rebuild) and then tried to Scrub with "Repair corrupted blocks" checked.
It seems to immediately abort?
UUID: 05ff2823-b50e-483b-8145-811943f76b2e
Scrub started: Fri Jun 14 17:08:11 2024
Status: aborted Duration: 0:00:00
Total to scrub: 60.95GiB
Rate: 0.00B/s
Error summary: no errors found
collective-diagnostics-20240614-1712.zip