I think Vanita might be referring to what will be my second example. Bruce mentions my first example, which ticked me off last night until I realized what was going on. And yes, the newly implemented relics can cause some havoc too.
(1) Last night I had a dungeon monster take five attacks against me in a row. I have a monster from the Japaneze Dojo Maze that has three "extra turn moves" with 0 or 1 turn cool downs. So that monster can keep on going until it runs out of stamina. I'm sure the dungeon monster had the same deal.
(2) I've encountered this a number of times and it irritates me when I have the speed advantage and no slows are displayed. This has been going on long before relics. And not sure how to type this out to make sense... We go in order: Me-1, Me-2, Me-3, AI-1, AI-2, AI-3, Me-1, AI-1, AI-2, AI-3, AI-1, A1-2, AI-3, and then sometimes a third time before I get to go again. Again, no slows, no freezes, etc. and either we're of the same level or I'm higher and with speed runes. In dungeons, I usually see double turns when either side has a monster(s) that is 10 levels or more higher.