[Support request] Adding a custom image size

When I add a new custom image size with this code in my functions.php:

add_image_size( 'install-system', 300, 200, true);

I get a doubled version of the image size as listed by wp-cli. Why is it doubling it?
+—————-+——-+——–+——+——-+
| name | width | height | crop | ratio |
+—————-+——-+——–+——+——-+
| full | | | N/A | N/A |
| 2048×2048 | 2048 | 2048 | soft | N/A |
| 1536×1536 | 1536 | 1536 | soft | N/A |
| large | 1024 | 1024 | soft | N/A |
| medium_large | 768 | 0 | soft | N/A |
| medium | 300 | 300 | soft | N/A |
| install-system | 300 | 200 | hard | 3:2 |
| thumbnail | 150 | 150 | hard | 1:1 |
| 1536×1536 | 0 | 0 | soft | N/A |
| 2048×2048 | 0 | 0 | soft | N/A |
| install-system | 0 | 0 | soft | N/A |
+—————-+——-+——–+——+——-+

What’s weird is the 2nd one is soft cropped.

When I remove the code from my functions.php both media sizes get removed in the wp-cli output.