That’s not a bug :) you need to complete the minds eye next. Get all the times between 15:00 and 8;00 green in there.
Viewing post in The Red Pearls of Borneo comments
The bug is that the screen went black after the credits and didn't return to the game, but was completely unresponsive. Surely that's not what you intended, because it's confusing, and it takes the player completely out of the game to restart it before being able to continue the post-game content. Also I saw no indication that the goal is to "complete" the mind's eye; I thought the mind's eye was just a visualization tool to aid in solving, which I didn't find necessary, so I didn't look at it much. I was attempting to complete each location's events, but I couldn't, because there were people I couldn't find. Again, it's confusing. I'm just reporting these behaviors so you can consider whether you can make it less confusing in the future. I really love the game and hope this feedback helps make it better for everyone.