as of 17.4 TTC font collection still don't work properly

this is in regards to 17.4 final..tho the newest 18 alphas also didn't work

incase anyone cares....... advanced subtitles with ass subs and ttc font collections still doesn't work properly
atleast not with the ttc files I'm currently using for a script

DFGyoKaiSho-W5
DCHoLeiSho-W3
DFEnKai-W5
DFKakuTaiHi-W4
DFLeiSho-SB
these are chinese/japanese TTC font files so MAYBE thats why....but they work fine on mpc-hc (with built in sub renderer and xyvsfilter) and vlc