A very interesting bug happened in ver. 1.00 and 1.01 of Antinomy of Common Flowers. It was first pointed out by nicovideo.jp/watch/sm32523861. If Yukari got hit while activating 式神「八雲藍&橙」 Shikigami “Ran Yakumo & Chen” spellcard, both Ran and Chen would freeze on the screen. The spellcard would be cancelled but there was no way to get rid of the frozen Ran and Chen from the screen.
If you activate the spellcard normally (without being cancelled), a different pair of Ran and Chen would appear on screen and spin. The frozen ones would still remain there and wouldn’t disappear. You were also able to get multiple copies of Ran and Chen stuck on the screen.
To test it, I’ve gone to Practice mode, set opponent as 2P (without mirroring my movement), set everything else on disable and manually press hit button while activating Yukari’s spellcard.
As of ver. 1.02 it seems to have been fixed.