b8890f8ee1
In my first [try](https://github.com/ziglang/zig/pull/20224) to fix 20212 I didn't reproduce bug on required kernel (6.9.2) and wrongly concluded that first two completions have different order on newer kernel. On my current kernel (6.5.0) order of completions is: send1, recv, send2. On 6.9.2 order is send1, send2, recv. This fix allows second two completions to arrive in any order. Tested on both kernels. Fixes: #20212