Software center does not render borders when using Equilux theme

[NewBLinux]

No Issue when using Materia and default theme in Ubuntu, It only happens in Equilux.

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If you report a bug or ask a question, please include the following information as required:

• Equilux version - v2018.10.29

• GTK+ 3 version - yes

• Distribution (and version) - Ubuntu 20.04.1 LTS

• Desktop environment (and version) - GNOME 3.36.3

• Related application (and version) - Ubuntu Software center

• Steps to reproduce -

  • set the theme Equilux in GNOME Tweaks and launch Ubuntu software center
  • Ubuntu software center does not render borders

• Screenshot(s)