Thank you, Parysatis, for bringing this to the attention of the DENON support team.
It does seem that the only solution for now is to downgrade. The problem is, what happens to the library? Additionally, I use the integration with SoundSwitch to control the lights. I asked the DENON team if there might be any issues, but they haven’t been able to give me an answer yet, as this matter needed to be escalated to a more technical level.
Perhaps it’s not as simple as just downgrading the controller’s firmware—there might be a need to downgrade the rest of the ecosystem as well.
If there’s any user who utilizes this functionality and has downgraded to the previous version, it would be great if they could confirm whether they’ve encountered any issues.