When there is a lot of Cinematic Sequencers in a single level, they have a strong tendency to not end when signalled to do so, causing many visual bugs and looping sequences that never end.
For example, this main menu screen is set to end as soon as the player clicks “Respawn” but sometimes, it never ends, causing them to be stuck in the main menu with no way of getting out.
This has wreaked havoc on my recent release.