If you go to fight and are at the menu to choose your Splinter (by the Summoner card).
Аnd if you have Dragon Summoner and choose it - next you must to choose conjugate Splinter.
The problem is But if you refuse the chosen Splinter - then in this list it became unclickable.
Treatment: to choose another Splinter and refuse it, only after this the first one will be able again.
But it's better to get the devs fix of this issue.
My other issues/suggestions to the SM:
Steem Monsters rival left the battle - but warning clacking still remains after
Request for slightly fix: add Stats tab into the card profile in the Market section
Steem Monsters Collection & Market tabs: lacks of pinned filter menu
Steem Monsters needs to improveslightly the Battle Statistics Table
pixelhunting issue for the Kiara Lightbringer card view
About some more info descriptions about the catual actions on the main SM page
But in all other aspects I see the Steem Monsters as a wonderful game
in process of the futher development!
My invite to join it