Description
everflow_testbed test is failing randomly on various platforms with t1-lag topology.

Steps to reproduce the issue:

1. Deploy t1-lag topology on a switch.
2. Run everflow_testbed test and observe if the issue reproduced.

Describe the results you received:
A full system dump and test log is provided:
everflow_testbed_test_log.txt
sonic_dump_arc-switch1038_20200818_162014.tar.gz

Describe the results you expected:
Test should always pass.

Additional information you deem important:

**Output of `show version`:**

```
(paste your output here)
```

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```