FRITZ!Box Tools: individual frequency bands are no longer available in the 5 GHz frequency range.

[ak1-git]

The problem

I own the Triband Router 4060 and the Triband Repeater 6000.
I have my mobile phone, tablet, PC, etc., connected to the 5-I frequency band.
I have my TV, TV Cube, Blu-ray player, wireless speakers, etc., connected to the 5-II frequency band.
Until now, I was able to toggle the 5-II frequency band separately—whenever needed.
Although the 5-I frequency band was also displayed, it appeared as "Unavailable."
Since version 2026.5.0, this is no longer possible—my automations and routines have stopped working.
Why was this changed?
Is it not possible to continue displaying the individual 5 GHz frequency bands separately?
I could not find any mention of this change in the changelog for this release.

What version of Home Assistant Core has the issue?

2026.5.x

What was the last working version of Home Assistant Core?

2026.4.4

What type of installation are you running?

Home Assistant OS

Integration causing the issue

FRITZ!Box Tools

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response