Picklist: Javascript error with fast selection

[appldo]

1) Environment

• PrimeFaces version: 6.2.9
  Version 6.1.x worked

• Affected browsers:
  Chrome/Firefox

2) Expected behavior

No Javascript errors
...

3) Actual behavior

When quickly selecting items in Picklist (e.g. with Selenium or manually by quickly selecting with 'SPACE/CLICK/SPACE/CLICK/SPACE') a javascript exception occurs:

core.js.xhtml?ln=primefaces&v=6.2.9:480 Uncaught TypeError: Cannot read property 'length' of null
at Object.scrollInView (core.js.xhtml?ln=primefaces&v=6.2.9:480)
at components.js.xhtml?ln=primefaces&v=6.2.9:16832
scrollInView @ core.js.xhtml?ln=primefaces&v=6.2.9:480
(anonymous) @ components.js.xhtml?ln=primefaces&v=6.2.9:16832
setTimeout (async)
(anonymous) @ components.js.xhtml?ln=primefaces&v=6.2.9:16831
dispatch @ jquery.js.xhtml?ln=primefaces&v=6.2.9:3
q.handle @ jquery.js.xhtml?ln=primefaces&v=6.2.9:3
trigger @ jquery.js.xhtml?ln=primefaces&v=6.2.9:4
simulate @ jquery.js.xhtml?ln=primefaces&v=6.2.9:4
c @ jquery.js.xhtml?ln=primefaces&v=6.2.9:4

4) Steps to reproduce

You can test this in the showcase:

https://www.primefaces.org/showcase/ui/data/pickList.xhtml

5) Sample XHTML

6) Sample bean