Encountering the same problem. Wanted to add that for me, it seems that whenever you click on/off the affected tab the text seems to re-correct itself to the proper width.
The issue doesn't seem to happen when tab widths arent resized, like when you reach enough tabs that you start scrolling through them instead of the tab bar being resized. This also only seems to be an issue if the tab title extends beyond the width of the tab, as in my screenshot the Gio UI tab doesn't seem to have this issue.
Orion 0.99.128.2-beta
macOS Sonoma (14.5)