big sur Safari lag

Hi ,
did update to big sur os last days .

safari started lagging when clicking in password input (the ones that look like this : prnt.sc/w4w05t )

also lag when it try to show " would you like to save this password " pop up : prnt.sc/w4w2oj

sometimes when clicking safari address bar .

my console have those analytic data , when crash happen :
com.apple.message.domain: com.apple.Safari.postPageLoadMemoryUsage

com.apple.message.domain: com.apple.Safari.postPageBackgroundingMemoryUsage

did try :
1 - delete history + empty cashes + deleted all safari data .

2 - as it is password input refill issue , did sign out of icloud + reset default keychains in keychain access .

3 - now downloading Xcode 12 , because saw some users suggesting it .

any other suggestion to solve this ?

thanks .
big sur Safari lag
 
 
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