Hi,I just encountered this issue: I wrote the following descriptor (this is just the input type where I have the issue: HtmlArea).
The result of this in Content Studio drop the entire block in between JustifyRight and BulletedList, Bold Italic and Underline do not show at all as it suppose to do, according to documentation: https://developer.enonic.com/docs/xp/stable/cms/input-types#htmlarea
The content-type works and save data the only thing I miss is this group of tools
This has nothing to do with your configuration
Those buttons can (and should) be used via keyboard shortcuts (Cmd-B, Cmd-I etc.) and were removed in version 2.2 to give room for the new buttons which don’t have keyboard shortcuts (see release notes). They are also available in fullscreen mode.