In hex, the string is:
506f 7765 7220 d984 d98f d984 d98f d8b5 d991 d8a8 d98f d984 d98f d984 d8b5 d991 d8a8 d98f d8b1 d8b1 d98b 20e0 a5a3 20e0 a5a3 6820 e0a5 a320 e0a5 a320 e586 97
That's the string encoded as UTF-8, so it's more like
50 6f 77 65 72 20 d9 84 d9 8f d9 84 d9 8f d8 b5 d9 91 d8 a8 d9 8f d9 84 d9 8f d9 84 d8 b5 d9 91 d8 a8 d9 8f d8 b1 d8 b1 d9 8b 20 e0 a5 a3 20 e0 a5 a3 68 20 e0 a5 a3 20 e0 a5 a3 20 e5 86 97
If we turn that into a sequence of (21-bit) Unicode code points, it becomes
000050 00006f 000077 000065 000072 000020 000644 00064f 000644 00064f 000635 000651 000628 00064f 000644 00064f 000644 000635 000651 000628 00064f 000631 000631 00064b 000020 000963 000020 000963
which, encoded as UTF-16, is
0050 006f 0077 0065 0072 0020 0644 064f 0644 064f 0635 0651 0628 064f 0644 064f 0644 0635 0651 0628 064f 0631 0631 064b 0020 0963 0020 0963
As UTF-16, there are no surrogate pairs, so the bug presumably isn't a problem with handling UTF-16-encoded Unicode characters bigger than 00FFFF.
I suspect that the string is probably being processed as UTF-16, because that's how CFString/NSString are encoded internally and because code handling UTF-8 that can't handle multi-byte characters couldn't handle anything other than ASCII.
U+0963 is DEVANAGARI VOWEL SIGN VOCALIC LL, which is a nonspacing mark; my guess is that it (or perhaps some other character in that sequence that's a combining character) is getting split, by the ellipsis, from the character with which it's supposed to combine, and that the rendering code is blowing up because of that.
If so, this has nothing to do with UTF-16 being too hard to handle correctly, or with the code not being able to handle characters that are "too many bytes", it has to do with sequences of characters sometimes having to be handled specially, and not just blithely split between characters.
It starts with "Power ", but I guess that's not important.
It might make the string long enough that the code displaying it on the main screen would abbreviate it and thus insert an ellipse.