[Exploring Test] Intermediate result graph for each trial got wrong when trial has many intermediate results

[Lijiaoa]

Environment:

• NNI version: 1.6
• NNI mode (local|remote|pai): local
• Client OS:
• Server OS (for remote mode only):
• Python version:
• PyTorch/TensorFlow version:
• Is conda/virtualenv/venv used?:
• Is running in Docker?:

Log message:

• nnimanager.log:
• dispatcher.log:
• nnictl stdout and stderr:
  log正常，数据正常

What issue meet, what's expected?:
meet error: sometimes, intermediate graph got wrong lines
Expected: With trial having many intermediate results, each trial could get right intermeidate result graph.

How to reproduce it?:

Additional information:

[Lijiaoa]

close for 不容易复现