When opening a saved module that is using the N163 expansion, the volume for the expansion chip is extremely low. Currently, I found that there are 3 workarounds that fix the issue:

1. Turning on/off N163 multiplexer emulation via Ctrl+Shift+M.

2. Turning on/off hardware-based mixing in the Module Properties setting.

3. Moving the N163 Device mix offset slider up/down in the Module Properties settings.