Fix get_plugins() bug

[BryceGattis]

Add suggested fix from @mmdanggg2 and add tests.

Closes #1618.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.43%. Comparing base (36e0537) to head (7b5b913).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1723      +/-   ##
==========================================
+ Coverage   58.29%   58.43%   +0.14%     
==========================================
  Files         126      126              
  Lines       17159    17160       +1     
  Branches     3505     3505              
==========================================
+ Hits        10002    10028      +26     
+ Misses       6493     6465      -28     
- Partials      664      667       +3     

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