Files are overwritten

Hi! First of all I really like the plugin. It makes advanced stuff very easy for me and my clients, but I recently found a bug:

We have a form where users can upload various files. Is User A uploads a file called “loremipsum.pdf” and the User B uploads a file with the same name in the same month, the file from User A will be overwritten, which obviously is very critical.

We need urgent help with this please.

Anyone also stumbled across this?

Currently we use version 3.15.3 of the plugin and 6.0.7 of ACF Pro.