For the audio asset could you please try toggling the Loading mode (FMOD Studio | Managing Assets - Loading Modes):
This will help to reduce the jump noticed when resuming the event. Another option may be setting the event macro Priority to Highest (FMOD Studio | Event Macros Drawer - Priority) which can also reduce some drift caused by the virtualization system. I will note this has been solved in 2.03.
Hope this helps.