All transactions pending then disappear from polyscan


When I call a contract on Mumbai, the transactions remain pending. They are visible on polyscan, but dissapear after about 20 minutes, and are still in the mempool in alchemy.
I tried with different values for gasPrice and gasLimit. I also tried with infura and moralis and it seems to do the same.

last transaction I tried : 0x288a1d590a5e985e1681ea0a5d725a13003b0197a5e8fb2c8a2cebdacac18aec

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at 5.55pm. It is still pending.

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Someone contact me by pm. I guess he’s from the support.