In 1.16.1 (and possibly versions prior), the zero-width non-joiner works as expected, but in 1.16.2, the symbol now shows a box with "ZWNJ" in it, and still is in 1.16.5

Examples in the attached pictures

Reproduction Steps

1. In 1.16.1, change the language to a right-to-left language (like Arabic), so that it would render properly
2. Copy "باتو ءين‌د"
3. Paste it in the Minecraft chat in both 1.16.1 and any versions after 1.16.1

            [X] The symbol appears as a box with "ZWNJ" in it