Bluetooth mouse won't reconnect - how to debug?

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I have a bluetooth mouse that works perfectly when first added to the system using the Gnome Shell bluetooth menu.

However after restarting my system, the mouse does not reconnect. I have to actually remove the device from the Bluetooth panel in system settings, then re-pair it. Once I do that it works perfectly until I restart or power cycle the mouse.

I've tried this with two mice now and it's consistent behavior. There are no errors in dmesg or Xorg.0.log, and I haven't had any success tweaking /etc/bluetooth/main.conf in likely ways.

Anyone know where bluetooth status info is logged?