fix: fix values being promoted to Float64 in problem construction
#6611
| Job | Run time |
|---|---|
| 51m 3s | |
| 35m 54s | |
| 16m 33s | |
| 52m 49s | |
| 25m 51s | |
| 15m 35s | |
| 23m 44s | |
| 40m 27s | |
| 42s | |
| 20m 58s | |
| 30m 3s | |
| 22m 31s | |
| 50m 52s | |
| 6h 27m 2s |