Unexpected "hard" interval calculation

[yorkz]

I have card due today as shown in the attached screenshots:

So with the current interval being 1.57 month, and “hard interval” being 1.2, the interval for answering “hard” should be 1.57 x 1.2 = 1.884, but why is it 1.7? Thank you in advance for any help.

My deck is on AnkiWeb with the note ID being 1659321525173, and card ID being 1659361697204 if you need to check.

[dae]

https://docs.ankiweb.net/studying.html#fuzz-factor

[yorkz]

Thanks @dae. Yep, but still, I think it would be nice if users would be able to disable “fuzz” temporarily to help understanding how the intervals are being calculated.