Attachments in mail not sent when plugin enabled

Hi,

WP Version : 5.7
Contact Form 7 Version : 5.4
Image Upload Optimize Version : 2.1.2

All is working ok except the file attachment(s) are not present in mail.

wether or not i use the ioucf7 shortcode in my form !
just enabling your plugin makes a simple form with only [file xxx] to not send the attachment, disabling it and the mail contains the attachment.

PS : I use cf7db and the files are presents in saved submissions.

Thanks