Avi index broken or missing since 7.3.0

sorry if this is not a bug
since 7.3.0 many films say - avi file index broken or missing
after choosing the ‘fix’ option the film might play, but if i go forward or back or accidentally touch touchpad/mouse the film stops and must go through ‘fix’ and play rom beginning again.
this issue def began when I got new 7.3.0. to files I already had from Tribler, and then new files too