Configuration backup does not save symlinks since firmware version RUT2_R_00.07.03.4 (RUT240)

I manage about 100 (number continuously increasing) RUT240 routers for our company. To this end I have built a system to automatically generate a custom configuration for each router. This includes an init script under /etc/init.d/ and a matching start symlink under /etc/rc.d/. These are included in the configuration tarball I generate to upload to fresh RUT240 routers.

This has worked fine for some time, but I recently noticed that current firmware versions do not install the symlink included in the tarball into /etc/rc.d/, it just gets skipped. I narrowed the change in behavior down to firmware version RUT2_R_00.07.03.4, the previous version RUT2_R_00.07.03.3 does not exhibit the behavior.

The firmware changelog includes the following bit, which sounds related:

RUT2_R_00.07.03.4 | 2023.02.09
            Fixed legacy backup upload
            Fixed upgrade from legacy FW issue with keep settings

Is this a bug or done on purpose. If done on purpose, why?

Somehow I cannot edit the title anymore, so just for clarification: the symlink is saved, but not restored.

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