Issue: Changes made to the enabled/disabled status of processors revert to default values after running software update

[TubularCorpration]

Describe the issue

Since at least 2409.4, after running an update the enabled/disabled status of processors are reset to their default, fresh-install values. This happens any time update is run, even if the system is already up to date. Changes to enabled/disabled status are still retained through reboots and power cycles as expected.

To Reproduce

Steps to reproduce the behavior:

For the sake of clarity, I'll use Osirus on a fresh, up to date 2409.4 install to demonstrate, but the behavior isn't specific to any particular processor.

1. Create a new instrument chain.
2. By default, Osirus is not visible in the MIDI Instrument/Synth page of the processor selector.
3. Bold-press encoder 4 to enter "view all" mode and enable Osirus.
4. Press back to leave "view all" mode. Orisus is now enabled and visible in the list.
5. Perform a software update from webconf
6. On the Zynthian, return to the MIDI Instrument/Synth page of the processor selector.
7. Osirus is no longer enabled and is not visible in the processor selector
8. This can be repeated with any processor - all changes made in "view all" revert to their default values after performing a software update

Expected behaviour

Changes made to the enabled/disabled status of processors should persist across software updates.

Actual behaviour

Changes made to the enabled/disabled status of processors are reset to the default values of a freshly flashed card when a software update is performed

Additional context

I reflashed my card when 2409.3 was released so I don't know if this issue was present before the first 2409.4 update.

Configuration

Hardware

Raspberry Pi 5 Model B Rev 1.0
Audio: V5 ADAC
Display: MIPI DSI 800x480 (inverted)
Wiring: V5
I2C: MCP23017@0x20, MCP23017@0x21
Profile: v5

System

Debian GNU/Linux 12 (bookworm)
Build Date: 2024-10-02
Memory: 8% (709M/8052M)
SD Card: 6% (26G/470G)
Temperature: 31.2ºC
Overclock: None

MIDI & UI

Tuning: 440 Hz
Master Channel: Off
Preload Presets: On
ZS3 (SubSnapShots): On
Power Save: 10 minutes
Audio Levels on Snapshots: On

Software

zyncoder: oram-2409.2 (36691b3) 
zynthian-ui: oram-2409.4 (dc1a1ca)
zynthian-sys: oram-2409.4 (9cf56bd)
zynthian-data: oram-2409.3 (305b301)
zynthian-webconf: oram-2409.3 (25cda92)