After experiments, the modification time and creation time of the decrypted file depend on the date and time of the encrypted file, not the time of the file before encryption. This shows that the date of the source file was not saved during the encryption process.
It is worth noting that the modification and creation time, in Winrar, provides an option to save.
Do not save file time. This may be a unified approach for encryption software, but I hope to see the first change. Please make sure that the developer has plans to solve this problem?