There is compatibility issue in Nerd Font Patcher for Iosevka 11 or up version. I try patching Iosevka 11.x with font patcher, but causing ligature removed from it. I want to keep ligature inside Iosevka 11, but the font patcher remove it.

And in Terminal progress, there's some error warning , i think this is causing ligature can't work in Iosevka 11 ?

"Internal Error: Attempt to output 66740 into a 16-bit field. It will be truncated and the file may not be useful."

And here is my command to running font patcher
fontforge -script ./font-patcher ./iosevka-bolditalic.ttf --complete

Any ide to bring back ligature in patched Iosevka 11's font ?