gh-133885: fix TSAN-0002 race of last_mode in gh-153852
#126430
| Job | Run time |
|---|---|
| 1m 1s | |
| 1m 1s |
last_mode in gh-153852
#126430
| Job | Run time |
|---|---|
| 1m 1s | |
| 1m 1s |