And ... ... how much free space is there on the HDR?
On Web-if, Diagnostics page, click on 'auto-log' - what does it say?
Auto-decrypt and auto-shrink will only work if there is enough free space to let them run safely ... below a certain point, the auto-processing stops and auto-log shows the message 'insufficient space'.
(For me, on a 1TB drive, the tipping point seems to be around 35GB free. However if you have some large files or HD recordings I think the tipping point will be higher)