Old version for AUR packages updates is not shown

Pamac --version

Pamac 10.5.0-1 - libpamac 11.5.2-1

Variant in use

GUI

Distribution

Manjaro

Desktop environment

KDE

What's not working

The old version of packages updates, usually displayed in a red zone, is empty for the packages coming from AUR, but correctly displayed for the packages coming from the official repositories.

How to reproduce?

Take a look at the following screenshot:

More information (optional)

It has started since recent libpamac update (11.5.0 or 11.5.1 to 11.5.2)