App icon won't show up in Pop_OS! 24.04

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Since upgrading Pop_OS! to 24.04 (Cosmic) the icon at the top bar won't show up.
This issue happens even with a fresh install of the OS and protonvpn.

Protonvpn version is 4.13.1

pop-os:~$ uname -ra
Linux pop-os 6.17.9-76061709-generic #202511241048~1764607909~24.04~df6b2b6 SMP PREEMPT_DYNAMIC Mon D x86_64 x86_64 x86_64 GNU/Linux