Tishana's Tidebinder appears sometimes to not permanently stop an ability from triggering on a card. I have most frequently run into this issue against the Ouroboroid/Managorger Hyrda/Sazh's Chocobo/the 2/1 green mythic from FF which doubles power on a landfall trigger.
I have countered the ability of all of these cards with a Tishana's and sometimes it does permanently shut down the triggers, but most of the time they start triggering again the next turn. Sometimes this seems to happen because the creature gets modified in some way (enchanted/gains a +1/+1 counter), but from my understanding of the rules that shouldn't create a new instance of the creature and the ability should still be shut down.
I play on a windows PC. Would appreciate Tishana's Tidebinder working correctly as it becomes a significantly worse card if the permanent shut down isn't on it and I have lose multiple games to this error so far.