Hi @GBreezy1, I can explain this for you!
This is a part of lumen. You’re very right- this is going to be worse in shadowed areas with a lot of indirect lighting because this is where the effects of lumen are most visible. You are also correct that adding more indirect light bounces helps this problem. Lumen by default does not make room for many multi-light bounces, since this gets costly very quickly. This page from Epic goes into detail on how Lumen works as well as common issues, including yours: Lumen Technical Details in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community
There are a lot of potential ways to fix this problem, but they are all going to come at some form of an increased cost. You can add more lights into that area, adjust the Lumen Scene Quality and Lumen Scene Detail in your postprocess, adjust the Final Gather Quality in your postprocess, or run some console commands to adjust various Lumen settings, though make sure you know what you’re doing before playing around with them (you can go to this page and type in “Lumen” to get a full list of commands https://jandusoft.github.io/)