White rectangle when rendering with webkit

[chrbirks]

When enabling webkit I get a white rectangle in the ui-doc frame. I have never used webkit before so I can't tell if it has worked before.

My lsp-ui settings:

        lsp-ui-doc-enable t
        lsp-ui-doc-header nil
        lsp-ui-doc-include-signature t
        lsp-ui-doc-position 'at-point
        lsp-ui-doc-alignment 'window
        lsp-ui-doc-use-childframe t
        lsp-ui-doc-use-webkit t

Emacs: 27.0.50 @ development branch
lsp-ui: 20191202.2004

[parvizfarnia]

I confirm that I have the same problem with Emacs 27.1 (compiled with --with-xwidgets) under ubuntu 20.04 (64bits), I just get a blank frame. Only a few times I saw several documentation lines printed but without any scrolling possibility neither horizontal nor vertical.

[Seanld]

With Emacs 28.0.50 and Spacemacs, I'm also getting a similar issue: