Mismatching spacing issues with Unicode U+2018 and U+201C in Noto Sans

[YusukeShirakihara]

Thank you for your great work!

This issue affects readability and can cause confusion in texts that use nested quotations, especially in German texts.
While Noto Serif does not have this problem, Noto Sans does.
In Noto Sans, a space appears when U+201E(„) and U+201A(‚) are together at the beginning of a nested quotation, but no space appears when U+2018(‘) and U+201C(“) are together at the end of a nested quotation, making it look like three U+2018 characters in a row.

The following is an example to clarify this issue.
„‚Guten Morgen‘“, sagte er.

Sample:
OS: Windows 11 Pro (23H2)
Font Version: 1.45

Noto Sans

Noto Serif

I have checked that the side bearings for U+2018 (‘quoteleft’), U+201C (“quotedblleft”), U+2019 (’quoteright’), and U+201D (”quotedblright”) are aligned and that kerning is set for these glyphs.
Should this issue be addressed by adjusting the usage or by adjusting the font?
What would be practical?

Thank you for your attention to this matter.