Unable to add keyframe after 120f

Synfig version 1.0.2
OS (uname -a): Linux Mydesktop 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Way to reproduce

  • Start a new Animation
  • First keyframe at 0f (Ok)
  • Add 2nd keyframe at 120f (Ok)
  • Add 3rd keyframe at 240f (fails)

When we try to change the time from 120 to 240 the time window reverts back to 120f

A short screencast (20sec) of the problem is available at https://youtu.be/bv6Lr3qExBI Note at time 12s we write 240f in the window and it reverts back to 120f at time 15s when we hit tab

Did you changed end time in properties?
Canvas>Properties>Time> change end time to 240f