If there are two spaces in wikitext where one font is wider than the other, the narrow space is always chosen automatically, but the wider space should always be chosen instead (automatically).
For publications I try to remember to manually add  , on both side of the entry, because currently the inline entries look cramped to me.
Please preview this on the wiki:
See how this<kbd> phrase is staged </kbd>and again, how it looks<kbd> with manually added </kbd>overrides that could be made effortless.
Manually added whitespace properly stages such entries.
Reported at Village pump "Fixed font transitions don't space correctly"