Hi @JamesT, apologies for the late reply.
We fixed this for the UC link coupler so if you highlight text and then press your universal coupler key (a slash by default) it won’t add an additional space.
However we didn’t change the inline link coupler behaviour. We’ve noted that this is a bit confusing so we will make it possible to just highlight text, press [[ and then enter to apply the card link to the current text without additional spaces and the original selection as the link’s alt text.