Call history problems after iOS 18 beta update

I've 14-Pro and I recently did update to "iOS 18 beta" using beta channel.
However, the first I noticed was a deleted call-history... After several tries (using tips from forums), nothing showed up.
Finally, I did reset all and reverted back to "17.5.1" and used the last iCloud backup (right before iOS 18 upgrade).
Call history is back, however it is limited to "only 1-month" back in time! Why?
I've 2 TB iCloud storage, why my call history is gone why? I keep backup of everything, and call-history contains very important details as well.
Please help in getting back my data asap.

I have this too arbitrarily all message history is wgone that’s older than about a month when some went back years…

my call-history contains very important information. I need it back. Apple support please respond. Currently I'm using 'iOS 18 Public beta'

Call history problems after iOS 18 beta update
 
 
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