Item selection does not work on Dropdown with scrollable panel

[nattukan0713]

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[x] bug report
[ ] feature request
[ ] support request => Please do not submit support request here, instead see https://forum.primefaces.org/viewforum.php?f=57

Codesandbox Case (Bug Reports)
https://codesandbox.io/s/primereact-test-forked-byk6b?file=/src/index.js

Current behavior
If the item is selected after scrolling, the scrolling position returns to the position before it was selected and the item selection fails.

Expected behavior
Item can still be selected after scrolling

• React version:
  16.13.1

• PrimeReact version:
  5.0.0-rc.1

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]
  Chrome　84.0.4147.125

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  ES6/7