Poison effect only appears for one frame
Tested with Steel Vipersword weapon, a cast-on-strike weapon that does Poison 3-7 pts for 1 sec on Touch. In addition to lasting only a frame, it appears in the wrong place. There is no such problem in Morrowind.
OpenMW: https://streamable.com/vm546b Morrowind: https://streamable.com/gnube0