Tidus, Yuna's Guardian Brawl Deck
i had Arwen, Mortal Queen on the battlefield and she had 2 or 3 indestructeble counters on it, because of proliferate.
i also had lost jitte in play with 3 counters on it, so i untapped 2 lands, so i could activate Arwen, Mortal Queen, but there was a bug and i couldnt activate her.
"Arwen enters with an indestructible counter on it.

{1}, Remove an indestructible counter from Arwen: Another target creature gains indestructible until end of turn. Put a +1/+1 counter and a lifelink counter on that creature and a +1/+1 counter and a lifelink counter on Arwen."

and it wouldnt let me as far as i know i can trigger her multiple times as long as i can remove indestructible counters from her and have the mana, and she had 3.... but i couldnt.. and i had the mana after i untapped lands with "Lost Jitte" please fix this bug.
this was in my opponents mainstep where i wanted to activate her ability because he wanted to deal 5 dmg to all my creatures so i wanted to activate it in response
i was checking multiple times if there was something that wouldnt let me activate her ability but there wansnt anything.

so how you can reproduce the bug,
play tidus, atack with arwen, my tidus trigger happens, she now have 2 industructible counters.
next turn move an indis counter from arwen to tidus, hit with one of em, trigger tidus, proliferate
now both have 2 indistructable counters, then on opponents turn try to activate her.
please fix the bug