az feedback auto-generates most of the information requested below, as of CLI version 2.0.62

Describe the bug

az container exec \

--resource-group dockers
--name debiandocker
--exec-command "/bin/bash"
--container-name debiandocker
The command failed with an unexpected error. Here is the traceback:
write() argument must be str, not bytes
Traceback (most recent call last):
File "/opt/az/lib/python3.6/site-packages/knack/cli.py", line 231, in invoke
cmd_result = self.invocation.execute(args)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/init.py", line 657, in execute
raise ex
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/init.py", line 720, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/init.py", line 691, in _run_job
result = cmd_copy(params)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/init.py", line 328, in call
return self.handler(*args, **kwargs)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/command_operation.py", line 121, in handler
return op(**command_args)
File "/opt/az/lib/python3.6/site-packages/azure/cli/command_modules/container/custom.py", line 623, in container_exec
_start_exec_pipe(execContainerResponse.web_socket_uri, execContainerResponse.password)
File "/opt/az/lib/python3.6/site-packages/azure/cli/command_modules/container/custom.py", line 666, in _start_exec_pipe
if not _cycle_exec_pipe(ws):
File "/opt/az/lib/python3.6/site-packages/azure/cli/command_modules/container/custom.py", line 684, in _cycle_exec_pipe
sys.stdout.write(data)
TypeError: write() argument must be str, not bytes

To Reproduce

To reproduce - create Azure Container and run 'az container exec'

Expected behavior

Expected behavior - no such issue, connect to container instead

Environment summary

root@Alexey-HP:~# az --version
azure-cli 2.24.0
core 2.24.0
telemetry 1.0.6
Python location '/opt/az/bin/python3'
Extensions directory '/root/.azure/cliextensions'
Python (Linux) 3.6.10 (default, May 21 2021, 07:23:15)
[GCC 9.3.0]
Legal docs and information: aka.ms/AzureCliLegal
Your CLI is up-to-date.

Additional context

The issue did not exist in the mid of April 2021