TEMPORARY WORKAROUND. If you create the search in the eBay app and
"follow" it, it doesn't add the + signs and will work as a saved search
from your account on the main site. As long as you don't edit the search
in the browser, it should stay working...
Same issue here. If I type the search terms in and bookmark the results
(even new searches created now), I can use that bookmark as a saved
search and it works. The actual "save" function for the search still
messes it up though.
I just tried it again and it's still messing up. A temporary workaround
is to enter the search terms (I use very long and detailed searches)
then bookmark the results in your browser. This doesn't work for the app
of course or if you want alerts.