When adding tabs which cause other ones to shrink, inactive tab titles can squish the text together. Upon closing tabs, unfocused tabs then stretch their text out. This issue appeared to be fixed here but it apparently has resurfaced in 0.99.128.2-beta.
Tab titles should always be the default text width and cut off when the tab has insufficient space to display the title.
0.99.128.2-beta
Sonoma (14)