I think all of these are just a coincidence. The dice result is predetermined using RNG but is randomly triggered when we roll the dice so if you are playing in a reputable and licensed casino, there is no way that the game is cheating you since the game system is monitored and even produces hashes for the provably fair verification.
On the other hand, if the blackjack is machine-generated then it also follows the process of slots and dice in determining its outcome. Btw, can you share the name of the gambling platform?
Indeed they have the chance but the question is, do they take that chance? The money involved or expenses they use in their operation and promotion is too huge to mess up by cheating their players. So I do not think that reputable casino cheats their player through algorithm because as far as I know they can be verified by professional gambling inspectors.