Fix RearrangeableListContainer<> crashing on replacement operations
#6631
| Job | Run time |
|---|---|
| 2m 8s | |
| 5m 14s | |
| 8m 31s | |
| 7m 21s | |
| 8m 30s | |
| 8m 42s | |
| 13m 30s | |
| 4m 58s | |
| 5m 51s | |
| 4m 20s | |
| 5m 45s | |
| 1h 14m 50s |