I'm editing a Chinese document containing certain European characters such as ē and í.
I've created a composite font that uses Roboto for numbers and latin alphabets, and Noto Sans CJK for the Chinese characters.

Recently I noticed some of the European characters are incorrectly recognized as Kanjis, and are set to Noto Sans CJK instead of Roboto.

By testing my composite font settings, I confirmed that these misbehaving characters are being recognized as Kanjis (the top row in the composite font window).

1. InDesign version: 17.3
2. Create a composite font as shown in Screen Shot 1
3. I expect all European characters to also be recognized as Latin alphabets
4. Some of the European characters are recognized as Kanjis, as can be seen in Screen Shot 2. The difference is subtle, to compare, I placed two ē side by side, and manually set the left one to Roboto and the right one to the composite font, see Screen Shot 3.