Maybe a found the source of the problem in this commit :
https://github.com/PrestaShop/PrestaShop/commit/f1887019b19983d461a26d5cc3ef4dbacbf68347
Erratum ... bad reading of the commit.
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Maybe a found the source of the problem in this commit :
https://github.com/PrestaShop/PrestaShop/commit/f1887019b19983d461a26d5cc3ef4dbacbf68347