The char '⌁' doesn't print right when is printed alongside a path.
I tested with different fonts and the problem persists.
Without the space (original)
With the space (45th line modified)
The 45th line in theme-lambda/functions/fish_right_prompt.fish would be:
echo -n $hostcolor'╭─'$hotpink$current_user$white' at '$orange$__fish_prompt_hostname$white' in '$limegreen(pwd|sed "s=$HOME=⌁ =")$turquoise