[HOTFIX] quick fix for occasional crashes in MPL_ALLTOALLV #133

Job	Run time
ci (Release, linux gnu-10)	13m 25s
ci (Release, linux clang-12)	14m 33s
ci (Release, linux nvhpc-24.3)	15m 26s
ci (Release, linux intel-classic)	10m 0s
ci (Release, macos)	9m 54s
ci (Debug, linux gnu-10)	13m 17s
ci (Debug, linux clang-12)	14m 8s
ci (Debug, linux nvhpc-24.3)	13m 46s
ci (Debug, linux intel-classic)	9m 16s
ci (Debug, macos)	9m 15s
	2h 3m 0s

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