Problem displaying title of custom buttons added with addButtonDefinition

[mehdi_tlili1]

I am working on a custom plugin for Fusion360 and I have problems getting it to display correctly.

When I hover on the pinned button, it displays the information correctly as shown below (Title and Tooltip)

However, when I open the dropdown list and hover over the same button from the list, I get this

This does not happen with the other buttons that come with Fusion360.

I am using the Basic Add-In command (Python) from this page as guide to add a button to the CAMActionPanel

Could this be fixed please?