Prefer legacy icons

[nostdex]

As you can see in the first screenshot, Spotify, Signal and Riot were adapted to whatever style this is. I assumed the Themes setting 'Icon masking' to disable this but it does not (themes settings in the second screenshot).
Should this setting disable this? Is this therefore a bug? Am I doing something wrong? I tested various combinations of settings and restarts of the the launcher and the phone, none worked.
Otherwise, could someone please add an option to return to legacy icons (e.g. Nova Launcher has an option 'Prefer legacy icons')?

Additionally the top and the left of some icons looks slightly cut off, but I am not completly sure about that...

Zim Launcher Version v0.6.2b (build 3010, via f-droid)
Android Version 8.1.0.
Phone BQ Aquaris V

Regardless of that, this launcher is awesome, exactly what I want my launcher to do and it is FOSS. Thank you all very much for this, Donation will follow.

[saulhdev]

it is already fixed in the current build. ( It's not released yet as I'm still working in some features).
Zim Launcher-aosp-zim-debug.zip

[saulhdev]

there isn't an option "prefer legacy icons" but you have some choices like changing the icon for a specific app or disable de icon masking in theme setting. let me know if it works on your phone.