After the upgrade to kde frameworks 5.97 akregator starts to display items of one feed in a different feed.
Downgrading of akreagtor does not help. Downgrading of kde-frameworks to 5.96 prevents further mix ups, but previously wrong items remain.
Thanks for the report, here we can only track the upstream bug and block future Frameworks stabilisation until solved. The next step would be isolating the exact KDE Frameworks package and then commit that regressed.
They have a potential fix for kio, that made it into kf 5.98. I havent checked the single patch, but kf 5.98 seems to work.
Thanks for checking back, closing this as fixed then.