Problem with binding iMac to active directory (Big Sur)

I have installed Big Sur beta 5 on an iMac late 2015 (2.8ghz quad core i5).
And then I have a big problem when using Big Sur.
When I used Big Sur with following conditions, active directory server went to 100% CPU usage.

• Binding iMac to active directory.

• login with an AD account.

When I checked the active directory server, it recorded many queries from this iMac in a short time.

I also tried same validations on other iMacs and got the same results.
I would be appreciate it if you if you have information about similar cases or workarounds.