CherryTree Papirus icon is missing

[repsorp]

• Distribution (version): Ubuntu 21.10
• Desktop environment: GNOME 40.5
• Installing method: Papirus Installer | PPA |
• App name (version): CherryTree 0.99.48

Following the last Flatpak update of CherryTree the Papirus icon appears missing

journalctl MESSAGE_ID=c7b39b1e006b464599465e105b361485
-- Journal begins at Mon 2022-06-20 18:41:18 CEST, ends at Sat 2022-07-02 16:02:55 CEST. --
juil. 02 11:50:38 tmp flatpak[1505684]: system: Uninstalled app/com.giuspen.cherrytree/x86_64/stable
juil. 02 11:50:38 tmp flatpak[1505684]: system: Uninstalled runtime/com.giuspen.cherrytree.Locale/x86_64/stable
juil. 02 11:50:43 tmp flatpak[1505684]: system: Pulled runtime/net.giuspen.cherrytree.Locale/x86_64/stable from flathub
juil. 02 11:50:43 tmp flatpak[1505684]: system: Installed runtime/net.giuspen.cherrytree.Locale/x86_64/stable from flathub
juil. 02 11:51:10 tmp flatpak[1505684]: system: Pulled app/net.giuspen.cherrytree/x86_64/stable from flathub
juil. 02 11:51:10 tmp flatpak[1505684]: system: Installed app/net.giuspen.cherrytree/x86_64/stable from flathub