I enter the formula in the latest Word for Office 365 (version 2003 (not Word 2003, the 2020 year version), build 12624) in LaTeX mode:
It converts to Professional look normally, but if I switch again to Linear and back to Professional, the alpha symbol is lost. Sometimes it is lost just after entering and the first conversion.
If it is
\alpha^2 everything is OK.
I can put just
^ at the end without a number, but it looks like an unfinished equation.
Does any other workaround exist to prevent missing symbols in equations?