Is it normal to get extremely high rep recommendations instead of weight increases?

For my wrist finger flexion curl, it asked me to go until I had 0 left in me at first, probably to calibrate. Then each day, that final number has gone up. Today, it said "10lbs, 11-13 reps, 31 reps, one in reserve."

So I go to 31, and I figure I maybe have another 3-4 left, so I go to 33. Then it auto adjusts the next line to "10lbs, 11-13 reps, 20 reps, one in reserve." I get to 20, and I figure I can do another 8, so I went to 27.

I am assuming it's going to just endlessly increase my rep count at this rate. When does it decide to increase weight?