New versions of Gnome have a broken behavior for double-click selections. Strings like URLs can'be be selected with double-click, as usual.
The correct behavior can be restored with:
$ dconf write \
/org/gnome/terminal/legacy/profiles:/:${PROFILE}/word-char-exceptions \
'@ms ":-,.;/?%&#_=+@~·"'
The - character should prefix all other, because apparently, otherwise it is interpreted as range meta character. Analogously to regex character classes, e.g. as in
[0-9]
vs.[-09]
.Btw, do you know the meaning of the
@ms
part?