Stock qty issue for item with stock qty=1

Hello,

We’re using WooCommerce with LiteSpeed cache plugin and all things works perfectly, apart from a strange and not easy replicable issue.

Randomly, for some products for which the stock qty is 1, in cart page there is the message that say “impossible to buy stock quantity =0”, in backend obviously the stock qty is 1. With a cache purge is possible to continue to checkout and complete the order, how can we fix this?

Thanks.