MSVC bytecode fails to find Bigarray STM counterexample

[jmid]

4 weeks back the scheduled trunk tests failed to find a Bigarray STM test counterexample on MSVC bytecode:
https://github.com/ocaml-multicore/multicoretests/actions/runs/9932690046/job/27434370275

random seed: 171860057
generated error fail pass / total     time test name

[ ]    0    0    0    0 / 1000     0.0s STM BigArray test sequential
[ ]    0    0    0    0 / 1000     0.0s STM BigArray test sequential (generating)
[✓] 1000    0    0 1000 / 1000     2.3s STM BigArray test sequential

[ ]    0    0    0    0 / 5000     0.0s STM BigArray test parallel
[ ]   86    0    0   86 / 5000    58.3s STM BigArray test parallel
[ ]  241    0    0  241 / 5000   119.3s STM BigArray test parallel
[ ]  358    0    0  358 / 5000   187.6s STM BigArray test parallel
[ ]  485    0    0  485 / 5000   247.7s STM BigArray test parallel
[ ]  605    0    0  605 / 5000   310.6s STM BigArray test parallel
[ ]  692    0    0  692 / 5000   372.4s STM BigArray test parallel
[ ]  797    0    0  797 / 5000   433.8s STM BigArray test parallel
[ ]  931    0    0  931 / 5000   495.8s STM BigArray test parallel
[ ] 1007    0    0 1007 / 5000   556.4s STM BigArray test parallel
[ ] 1115    0    0 1115 / 5000   618.3s STM BigArray test parallel
[ ] 1252    0    0 1252 / 5000   679.1s STM BigArray test parallel
[ ] 1363    0    0 1363 / 5000   741.2s STM BigArray test parallel
[ ] 1478    0    0 1478 / 5000   806.4s STM BigArray test parallel
[ ] 1572    0    0 1572 / 5000   867.2s STM BigArray test parallel
[ ] 1737    0    0 1737 / 5000   933.8s STM BigArray test parallel
[ ] 1803    0    0 1803 / 5000  1003.8s STM BigArray test parallel
[ ] 1852    0    0 1852 / 5000  1066.7s STM BigArray test parallel
[ ] 1934    0    0 1934 / 5000  1128.7s STM BigArray test parallel
[ ] 1989    0    0 1989 / 5000  1188.8s STM BigArray test parallel
[ ] 2099    0    0 2099 / 5000  1254.4s STM BigArray test parallel
[ ] 2177    0    0 2177 / 5000  1315.5s STM BigArray test parallel
[ ] 2260    0    0 2260 / 5000  1382.2s STM BigArray test parallel
[ ] 2347    0    0 2347 / 5000  1443.0s STM BigArray test parallel
[ ] 2471    0    0 2471 / 5000  1505.6s STM BigArray test parallel
[ ] 2618    0    0 2618 / 5000  1566.7s STM BigArray test parallel
[ ] 2714    0    0 2714 / 5000  1626.8s STM BigArray test parallel
[ ] 2819    0    0 2819 / 5000  1697.4s STM BigArray test parallel
[ ] 2922    0    0 2922 / 5000  1759.4s STM BigArray test parallel
[ ] 3010    0    0 3010 / 5000  1821.1s STM BigArray test parallel
[ ] 3112    0    0 3112 / 5000  1886.8s STM BigArray test parallel
[ ] 3212    0    0 3212 / 5000  1952.8s STM BigArray test parallel
[ ] 3323    0    0 3323 / 5000  2019.0s STM BigArray test parallel
[ ] 3415    0    0 3415 / 5000  2079.1s STM BigArray test parallel
[ ] 3536    0    0 3536 / 5000  2141.2s STM BigArray test parallel
[ ] 3647    0    0 3647 / 5000  2201.7s STM BigArray test parallel
[ ] 3759    0    0 3759 / 5000  2267.0s STM BigArray test parallel
[ ] 3849    0    0 3849 / 5000  2330.8s STM BigArray test parallel
[ ] 3968    0    0 3968 / 5000  2391.4s STM BigArray test parallel
[ ] 4071    0    0 4071 / 5000  2456.7s STM BigArray test parallel
[ ] 4170    0    0 4170 / 5000  2517.2s STM BigArray test parallel
[ ] 4281    0    0 4281 / 5000  2578.3s STM BigArray test parallel
[ ] 4358    0    0 4358 / 5000  2640.2s STM BigArray test parallel
[ ] 4438    0    0 4438 / 5000  2700.8s STM BigArray test parallel
[ ] 4615    0    0 4615 / 5000  2762.4s STM BigArray test parallel
[ ] 4734    0    0 4734 / 5000  2826.9s STM BigArray test parallel
[ ] 4831    0    0 4831 / 5000  2895.5s STM BigArray test parallel
[ ] 4941    0    0 4941 / 5000  2955.5s STM BigArray test parallel
[✗] 5000    0    0 5000 / 5000  2972.4s STM BigArray test parallel

--- Failure --------------------------------------------------------------------

Test STM BigArray test parallel failed:

Negative test STM BigArray test parallel succeeded but was expected to fail
================================================================================
failure (1 tests failed, 0 tests errored, ran 2 tests)
File "src/bigarray/dune", line 4, characters 7-16:
4 |  (name stm_tests)
           ^^^^^^^^^
(cd _build/default/src/bigarray && ./stm_tests.exe --verbose)
Command exited with code 1.