[NTG-context] slanted font feature: LMTX vs. MkIV

Dear list, I have the following sample (using current latest from 2023.08.27 13:48): \setupinteractionscreen[option=max] \definefontfamily[maf][rm][DejaVu Sans] [sl={style:tf, features:{default,slanted}}] \setupbodyfont[maf, 8pt] \setupfittingpage[offset=1ex] \starttext \startTEXpage a {\em b} \stopTEXpage \startTEXpage[foregroundstyle={\setupbodyfont[100pt]}] a {\em b} \stopTEXpage \stoptext Using LMTX higher font size gives less slanted text (or not at all). Using MkIV text is slanted fine, independent from font size. Could anyone confirm the issue? Many thanks for your help, Pablo