Incorrect symbols in Books and Signs for some characters using Alt codes as input

When entering some Unicode characters in Books and Signs using Alt+code, they dont display the correct character according to the convention list (CP437 and others)

Examples:

Alt 236 should give ∞, gives ý instead (Alt 0253)

Alt 239 should give ∩, gives ´ instead (Alt 0180)

Alt 251 should give √, gives ¹ instead (Alt 0185)

All this symbols can be correctly copy-pasted into Books and Signs