Org mode version 9.7-pre (release_9.6.4-327-gf81ba4

org-protocol://store-link?url=http:%2F%2Flocalhost%2Findex.html&title=The%20title
stores http://localhost/index.html

org-protocol://store-link?url=val&key2=val2
stores val

org-protocol://store-link?url=val?key2=val2
stores val?key2

org-protocol://store-link?url=val?key2?val2
stores val?key2?val2

org-protocol://store-link?url=http:123&title=t: w: q&a - r-s (a)
stores nothing

emacsclient "org-protocol://store-link?url=http:123&title=t: w: q&a - r-s
(a)"
shows *ERROR*: Wrong type argument: arrayp, nil

IMO the last example is a fully plausible link. I actually need it to
create a link which then calsl e.g. the outlook protocol.

~2 months ago the same links worked fine.