Window decrations not working in hexchat

[d0pefish]

After the last batch of updates i have a problem where the window decorations buttons disappear in hexchat. I have had it happen on 2 desktops. if you guess where the buttons should be and click there then they work but the minimize, mamimize and close buttons are not viewable. Ive tried switching window themes and it still occurs, any ideas? 

[leszek]

Did you tried the default breeze one ?
Is this the only app ?
Did you try disabling the desktop effects (toggle on/off with Alt+Shift+F12)