Play Level Sequence works in all editor modes, but not in real game

I have several level sequences that I trigger in the level blueprint. They all play fine and the events in them fire. However, when I share the level and test it in the full Unreal Tournament 4, custom deathmatch game vs bots, the sequences do not play. What is the problem?

I added a test UTMatinee and it played without issues. Looks like the “legacy tool” is the only thing working.