scroll to the wrong position when in iframe

[NoName4Me]

• chrome 83.0.4103.106 on Mac
• scroll-into-view-if-needed@2.2.25

• button[click to scroll]: scroll by this scroll-into-view-if-needed
• button[click to scroll by brower API]: scroll by native Element.ScrollIntoViewIfNeeded

reproduction: https://codesandbox.io/s/elegant-cdn-75n62

[magic-akari]

Hi,
I have fixed the similar issue in magic-akari/seamless-scroll-polyfill@a7409a3 .

Try: https://codesandbox.io/s/autumn-http-zcwn0

Hope this helps.