Lingering shadows that stick to the ground after movement - how to resolve?

[feralmoans (manywerewolves)]

I posted this in another thread and thought I’d add here too: I’m noticing that this happens with the default mannequin and default settings whenever the quality is changed from Medium to High without restarting the engine. I don’t know how the internals work, but I’m wondering if there is some kind of cache that is not being updated or invalidated properly.

Player mesh leaves shadow residues on ground when moving

I ran into this issue with 3rd party models and found the solution mentioned above about a month or two ago. However, this is also happening to me with default template projects (using the default engine mannequin), and I noticed that it seems to occur if I switch from Medium quality to High without restarting the engine. Restarting the engine after changing the quality slider seems to fix the issue. I’m wondering if there is some sort of cache that isn’t updating or invalidating properly? […

edit: Well, not even an hour later I’ve been exclusively working in the engine on High and the shadow residue thing is still an issue with the default mannequin.