Leg module Problem:
When you add Leg Module to Humanoin skeleton (Quinn, for example) you can find out than it creates wrong ball (toe) sockets for legs (example for right leg).
To fix that you should edit Leg control rig (double click on it in pallete). The main problem is bug in function that decides which leg we are trying to make.
- Open Leg Control rig
- Find function “Utils/Get Side from Metadata”
- Add Not node before return value (as shown on picture)
I did not dive deep into this function logic but it absolutely MUST be reviewed and rewrited.
Foot module Problem:
Well, this bug was more tricky and hard to find. When you add Foot module to the socket on the RIGHT leg these is always wrong Foot bone but all OK on left Foot (see picture).
The problem is… Yes, bug in side detection (but not only 
)
Fow to fix:
- Open Foot Control rig
- Find Connector Event Graph
- It is missing bool result of foot side
- Do NOT trust this cool “v2” function)
- Add new variable and save INVERTED result, after that connect it to If node
That’s all. I don’t know how to write bug reports proper way, I’d welcome any advice on this and am ready to edit the post.