bugfix unicode-math ?

latex/paquets.sty

@@ -61,11 +61,12 @@
 \DeclareMathSymbol{,}{\mathpunct}{digits}{`,}
 \DeclareMathSymbol{;}{\mathpunct}{digits}{`;}
 
-\AtBeginDocument{\let\setminus\smallsetminus}
+\AtBeginDocument{\let\setminus\smallsetminus%
+\setmathfontface\mathit{texgyrepagella-italic.otf}[Scale = MatchLowercase]}
 \setmathfont[range=scr]{XITS Math}
 \setmathfont[range={\mdlgwhtcircle,\mdlgwhtsquare,\mdlgwhtdiamond}, Scale=.85]{STIX Two Math}
 \setmathfontface\mathcal{MnSymbol}
-\setmathfontface\mathit{texgyrepagella-italic.otf}[Scale = MatchLowercase]
+
 \setmathfontface\mathsf{texgyredejavu-math.otf}[Scale = MatchLowercase]
 \def\tmit#1{\text{\fontspec{texgyrepagella-italic.otf}[Scale = MatchLowercase] #1}}
 \let\mtit\tmit