Crossed lines don't get deleted

[sprnza]

I use ver. 1.3 installed from f-droid. So if I tap double check marks button in the top right corner with some line being crossed it doesn't get deleted. Just an empty flash notification appears and that's it.
Android 4.4.4

[sprnza]

Ok, it's being deleted, but doesn't disappear from the list until next sync.