QueryFontPlatform - crashing only in SDK CC 2020

Hello

InterfacePtr<IFontMgr> iFontMgr(GetExecutionContextSession(), UseDefaultIID());
if(iFontMgr)
{
    IPMFont* pfont = iFontMgr->QueryFontPlatform(fontname,IFontMgr::kNormal);
    ....
}

ヒラギノ丸ゴ Pro W3

I am trying to Query Font Platform like source code above. Font name I am setting is  Japanese font (mentioned above). Above code perfectly works for all SDK excepts ID SDK 2020. Even this code works with SDK2021

I am just not getting why its crashing only for SDK CC2020, can it be Adobe SDK bug? This happens only on Macintosh Platform

Can someone help me in this,

Thanks 

Chetan