Am currently using the web-sdk in production. When entering a valid discover card, when I get to the 13th digit for the card number the cursor skips to the expiration date field.
This is confusing some customers as they think it is broke, even though you can click back in the card number field and complete the full valid 16 digits.
Are you able to reliably replicate this? If so we need to connect to reproduce so I can take this to the team. 
Yes, I was able to duplicate this issue on my end and it does it every time I begin to type this specific discover card number. I only have one card number to work with.
Thank you, I was able to replicate this and have reached out to the team.