I believe this has been posted before, but some of the thread has images removed so I'm not sure about it.
After you play osu!mania or watching osu!mania replay/autoplay once (doesn't have to complete it), the "Ki" icon on HP bar disappears under other modes. This doesn't apply to new HP bar skin format, only old one does.
1. Go to osu!mania mode and play or watch replay/autoplay once.
2. Go to any other modes and play or watch replay/autoplay.
3. Notice that the "Ki" icon disappears.
4. Workaround fix: reload skin by entering skin selection and return.
After you play osu!mania or watching osu!mania replay/autoplay once (doesn't have to complete it), the "Ki" icon on HP bar disappears under other modes. This doesn't apply to new HP bar skin format, only old one does.
1. Go to osu!mania mode and play or watch replay/autoplay once.
2. Go to any other modes and play or watch replay/autoplay.
3. Notice that the "Ki" icon disappears.
4. Workaround fix: reload skin by entering skin selection and return.