This game has been one of the best I’ve ever played for smooth post update performance but there’s always a chance of unintended consequence when updating the coding. The devs here seem to be pretty quick in identifying fixes when issues are raised (assume you are posting specifics in the bugs thread to help them on this front).
You should try Magic The Gathering Puzzle Quest for post update chaos. Literally thousands of cards with dozens of unique effects and something crazy always happened and often hard to fix.
The one near game breaking problem I experienced (and it’s a real stretch to call it that) here was that weird alliance wars problem of no damage post fight and was addressed well and iirc with compensation. I don’t perceive any sort of conspiracy.
Caveat: I am not remotely a higher level player so my observations don’t cover high level titans and rich arrays of HOTM type cards where such effects may be more apparent.