mails display blank screen with webkitgtk 2.36.0

[Hello71]

after upgrading from webkit-gtk 2.34.6 to 2.36.0, opening both HTML and plaintext mails result in a completely blank new tab. the tab bar is still visible, and it is possible to use keyboard shortcuts (e.g. r opens configured text editor, V displays raw message) but the message area remains blank. when composing a new message, the controls (From, Markdown, etc) are visible and usable but the message is not. there seems to be no relevant console messages when starting astroid or opening mails.

[7FM]

Same problem here.
But my console output contains:

EGLDisplay Initialization failed: EGL_NOT_INITIALIZED
Cannot create EGL context: invalid display (last error: EGL_SUCCESS)

[7FM]

I have found a workaround, Try starting astroid with WEBKIT_DISABLE_COMPOSITING_MODE=1.
Source: NixOS/nixpkgs#169170