Importing SVG file not specifying a size

[Ofnuts]

If you read the bug report and the comments, the problem is the version of the librsvg that you have. 

• You installed Gimp from a PPA, so it uses whatever librsvg is installed on your system (which likely comes from the 18.04 repo).
  
• I use the Linux flatpak version, that comes with its own specific librsvg version, which, due to some not totally unexpected coincidence,is the same version that is used in the Windows packaging.
  

So Windows user have the problem, Linux flatpak users have the problem, and you have another problem (because the logo renders correctly for us) Note that perhaps your librsvg is older than the one delivered with Gimp (this problem is a regression in recent librsvg versions)