Fake RNG? Touch at 90% chance with Good and Excellent conditions.

[Nurvus]

I'm noticing that with Steady Hand + Basic Touch (70+20% Success) I am almost guaranteed to fail with Excellent Condition.
I also seem to fail in Good Condition far more often than 1 out of 9, but I haven't kept track so it may be my imagination.

It is like the RNG isn't truly RNG.

It feels as though the game calculates "when" you will fail rather than rolling the dice at every step.
When you get an Excellent condition it seems you are more likely to fail.

Anyone have similar experience?