Visualization of timedomain schedules using circuit_diagram_matplotlib draws gates overlapped
* Quantify version: core 0.4.0, scheduler 0.3.0
* Python version: 3.8.x
* Operating System: Ubuntu 20.04 WSL2
### What I Did
See figure
### What Was Expected
Circuit diagram to be displayed in correct order with no overlaps.
### What Actually Happened
Potential hint is probably in terms of the ref_op for these schedules.
issue