The ansible's nmcli module is broken in ansible 2.9.13 as well. 
Specifically, although the bug is different from the 1176459 it results to the
same problems, inability to configure NM based networks. 

This time, the bug appears if you try to create a bridge network on RHEL 8.x
and openSuse Leap 15.2 (so, I suppose SLES is affected too). 

The exeception I get is: 
----------------------------
An exception occurred during task execution. To see the full traceback, use
-vvv. The error was: TypeError: expected str, bytes or os.PathLike object, not
int
fatal: [server.example.com] FAILED! => changed=false 
  module_stderr: |-
    Shared connection to 192.168.0.1 closed.
  module_stdout: |-
    Traceback (most recent call last):
      File
"/home/ansible/.ansible/tmp/ansible-tmp-1599914142.4146016-16901-73091430540718/AnsiballZ_nmcli.py",
line 102, in <module>
        _ansiballz_main()
      File
"/home/ansible/.ansible/tmp/ansible-tmp-1599914142.4146016-16901-73091430540718/AnsiballZ_nmcli.py",
line 94, in _ansiballz_main
        invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)
      File
"/home/ansible/.ansible/tmp/ansible-tmp-1599914142.4146016-16901-73091430540718/AnsiballZ_nmcli.py",
line 40, in invoke_module
        runpy.run_module(mod_name='ansible.modules.net_tools.nmcli',
init_globals=None, run_name='__main__', alter_sys=True)
      File "/usr/lib64/python3.6/runpy.py", line 205, in run_module
        return _run_module_code(code, init_globals, run_name, mod_spec)
      File "/usr/lib64/python3.6/runpy.py", line 96, in _run_module_code
        mod_name, mod_spec, pkg_name, script_name)
      File "/usr/lib64/python3.6/runpy.py", line 85, in _run_code
        exec(code, run_globals)
      File
"/tmp/ansible_nmcli_payload_hlhjzhtc/ansible_nmcli_payload.zip/ansible/modules/net_tools/nmcli.py",
line 1557, in <module>
      File
"/tmp/ansible_nmcli_payload_hlhjzhtc/ansible_nmcli_payload.zip/ansible/modules/net_tools/nmcli.py",
line 1540, in main
      File
"/tmp/ansible_nmcli_payload_hlhjzhtc/ansible_nmcli_payload.zip/ansible/modules/net_tools/nmcli.py",
line 1396, in create_connection
      File
"/tmp/ansible_nmcli_payload_hlhjzhtc/ansible_nmcli_payload.zip/ansible/modules/net_tools/nmcli.py",
line 690, in execute_command
      File
"/tmp/ansible_nmcli_payload_hlhjzhtc/ansible_nmcli_payload.zip/ansible/module_utils/basic.py",
line 2590, in run_command
      File
"/tmp/ansible_nmcli_payload_hlhjzhtc/ansible_nmcli_payload.zip/ansible/module_utils/basic.py",
line 2590, in <listcomp>
      File "/usr/lib64/python3.6/posixpath.py", line 288, in expandvars
        path = os.fspath(path)
    TypeError: expected str, bytes or os.PathLike object, not int
  msg: |-
    MODULE FAILURE
    See stdout/stderr for the exact error
  rc: 1
------------------

Ansible version: 2.9.13
Python on RHEL server: Python 3.6.8
Python on openSUSE Leap 15.2: 3.6.10

Controller node: 

ansible --version
ansible 2.9.13
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/root/.ansible/plugins/modules',
'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.6/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.6.10 (default, Jan 16 2020, 09:12:04) [GCC]