Issue with missing minimize and maximize buttons in CLion on Ubuntu 24.04.2 LTS

Hello, I just installed CLion 2024.3.3 on Linux Ubuntu 24.04.2 LTS using the following commands:

sudo apt install clang* g++ build-essential default-jdk flatpak
sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
sudo flatpak install flathub com.jetbrains.CLion
However, when I launch CLion for the first time, I notice that the minimize and maximize buttons are missing. There is only a close button (screenshot attached).

• Windowing system: X11
• CLion version: 2024.3.3
• Flatpak version: 1.14.6

I have already checked my system settings and confirmed that other applications display the buttons correctly.

What can I do to restore the missing buttons? Any help would be appreciated!