The rate at which the grout is travelling is slowing down now. The easiest cracks have received grout, and it is becoming harder to push it further into the cracking system
The amount of cement injected so far is 3.87 bags, which is quite appropriate for this water test value.
The sketch shows the possible penetration of grout so far:
So the hole is taking the grout at a reasonable rate, and all is going well. So there is no need to change anything and on we go for the next 15 minutes.