Seems like a global practice. Wrote about it with some more details of why it's a bad practice.
The Misconception of Disabling Paste on Password Fields - Get Blogged by JoKi jochen.kirstaetter.name/the-misconce...
jochen.kirstaetter.name
The Misconception of Disabling Paste on Password Fields
Blocking clipboard paste on password fields does not thwart attackers. It sabotages password managers and ruins authentication security.