Could Infuse temporarily move subtitles up when the timeline OSD is showing, like the Apple ‘TV’ app does? 
For those of us who use subtitles a lot it is hard to read subs when doing 10 sec skips or pausing, because the playback OSD lingers for several seconds right in front of the subtitle text. Apple’s ‘TV’ app elegantly moves the subs above the OSD temporarily. 