I think this has been true also for USB MIDI controllers on individual universes or USB network interfaces.
This type of issue has been reported several times over the years in these forums.
The reason is that QLC+ saved indices of devices without actually considering the uniqueness of them.
So a few days ago I finally found some time to limit this behaviour and make QLC+ behave consistently over startups.
Where possible, I added a serial number to the device name, like this: USB-RS485 Cable (S/N: ABCD1234)
Network interface names, instead, are unique by definition.
MIDI controllers and HID devices, unfortunately, don't have any unique identifier, so two controllers with the same name will still have an issue.
These unique names will be saved into your project, so at the next QLC+ startup, a match by name will be looked up, instead of a dumb index lookup.
If no name match is found (e.g. device disconnected or replaced), the previous method by index is used, which in some cases might be useful.
Test versions for all OSes are available, so please help test this change and let me know if it helps in those cases reported in the past (and obviously in "normal" cases)
Thanks everyone!
P.S. I tested a few devices
