udisks2 was uploaded recently to Debian sid. With this, people might have seen hidden encrypted disks reappear in Thunar. Hiding disks in udisks was previously done by setting an udev propery. For example, I did this using /etc/udev/rules.d/99-hide-disks.rules:
KERNEL=="sda2", ENV{UDISKS_PRESENTATION_HIDE}="1"
This is not valid anymore in udisks2, but only the property name has changed. You can simply replace by:
KERNEL=="sda2", ENV{UDISKS_IGNORE}="1"
I'm not too sure yet if it has side-effects (PRESENTATION_HIDE
seems pretty harmless, but IGNORE might be a bit more invasive) but
for now it seems to work just fine.