Missing SVGs for extended charsets

Using the gwfh.mranftl.com/fonts UI, downloading all 18 weights/styles each of Roboto and Roboto Condensed with Historic Suppport:

When the charset is latin or latin + latin-ext I get all EOT, SVG, TTF, WOFF and WOFF2 files as expected, totalling 90 files each for Roboto and Roboto Condensed.

Extending the charset to cyrillic + cyrillic-ext + greek + greek-ext + latin + latin-ext only generates an SVG for Roboto Regular (the other 17 SVGs are missing). For Roboto Condensed, SVGs are generated for Roboto Condensed 300 non-italic, and all weights of italic (so the 8 remaining non-italics are missing).