how to reproduce:
DESKTOP (Google Chrome Version 99.0.4844.51):
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copy the card number to memory, for example 4111111111111111
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right mouse click on "Credit Card Number"(or "CVV") to get context menu
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left mouse click on "Paste"
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left mouse click anywhere on the page (for example, in another field)
the result is on screenshot https://prnt.sc/varH-pUkDemj
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if instead of clicking anywhere on the screen with the mouse, go to another form field using with clicking "tab", the handler is triggered
https://prnt.sc/Y0Xx6dZMnqMV
Android MOBILE (Google Chrome)
- copy the card number to memory, for example 4111111111111111
- long click on "Credit Card Number" field to bring up the menu
- click on Paste
- click anywhere on the page
The value in the field is not formatted and apparently not validated