The bug seems quite straightforward, a simple lack of update, so hopefully would be fixable by someone able to dig into the code a bit.
I posted this question a couple times on the ProjectLibre SourceForge issue tracker, but the developers kept deleting it, so I am looking for someone that is both PM and SW knowledgeable that could help. I asked the developers about the bug, however they are working on a paid cloud version and don't plan to fix the desktop version. I know it's not much, but I'd be willing to contribute a couple hundred dollars to a solution. I'm wondering if anyone has a simple solution I've missed, or would be willing to look at the source code (on SourceForge) to find a fix.
I'm a big open source supporter, and want to switch from MS Project to ProjectLibre, however it does not display the critical path correctly for projects above a certain size.