The UI is at least sometimes rejecting moves that seem to violate the suicide rule (because they are surrounded by opponent's stones) but in fact execute a capture because the eye is the only liberty for an entire chain. For example:

Here black, the human player, would like to place at E8 (which should trigger a spectacular capture of all white pieces, actually) but the UI is not even registering it when I click there. (When I hover there it highlights the spot, so the UI is definitely live, it's just ignoring clicking there.)
This is in game # 579e75ea3a0ac6306cd86e1e .