MySQL Workbench EER diagram: edges of display cut off

I'm having an issue where the edges of the display are cut off when viewing an EER diagram in MySQL Workbench:

I'm running on Ubuntu 20.04. I've tried the following already:

• Resizing the window
• Changing display resolution (default is 1920 x 1080, I tried reducing to 1680 x 1050)
• Changing display scale (default is 100%, I tried 125%)
• Setting environment variable GDK_SCALE=1 on startup

When I run from the command line, everything looks fine until I open EER diagram, at which point I get this output:

(mysql-workbench-bin:13508): Gtk-CRITICAL **: 15:01:10.921: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed

This is what my wb.1.log file looks like:

    base dir: /usr/share/mysql-workbench
    plugin path: /usr/lib/mysql-workbench/plugins
    struct path: /usr/share/mysql-workbench/grt
    module path: /usr/lib/mysql-workbench/modules
    library path: /usr/share/mysql-workbench/libraries
    user data dir: /home/shura/.mysql/workbench
    open at start: 
    open type: 
    run at startup: 
    run type: 
    Force SW rendering: No
    Force OpenGL: No
    quit when done: No
15:05:22 [INF][      WBContext]: WbContext::init
15:05:22 [INF][            WBA]: Looking for extension modules for WBA...
15:05:22 [INF][            WBA]: 0 extension modules found
15:05:22 [WRN][            grt]: Duplicate plugin name wb.tools.cmdlineClient   There is more than one plugin with the name wb.tools.cmdlineClient (in PyWbUtils and PyWbUtils).
15:05:22 [WRN][            grt]: /home/shura/.mysql/workbench/connections.xml:23: link 'f4a743c2-498c-11ec-b08f-f34455d9e052' <object GrtObject> key=owner could not be resolved
15:05:22 [WRN][            grt]: Duplicate plugin name wb.tools.cmdlineClient   There is more than one plugin with the name wb.tools.cmdlineClient (in PyWbUtils and PyWbUtils).
15:05:22 [INF][      WBContext]: System info:
    MySQL Workbench Community (GPL) for Linux/Unix version 8.0.27 CE build 1228725 (64 bit)
    Configuration Directory: /home/shura/.mysql/workbench
    Data Directory: /usr/share/mysql-workbench
    Cairo Version: 1.16.0
    OS: Ubuntu 20.04 x86_64
    CPU: 16x Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz (3800.000MHz) - 31.14GiB RAM
No video adapter info available
    Distribution: Ubuntu 20.04.3 LTS

    Fips mode enabled: no

I've tried googling the warnings, and haven't found anything that points me in an obvious direction. Grateful for any advice!