Orion "stops caring" about some tabs when not used for a while (or used in a previous session as pinned tabs). If I click in the tab, it reloads and I can see the (colored) icon in the tab again, and I am able to "see" it properly in the dark mode, which doesn't strain my eyes so much as the bright/light one.
I have learned about the Orion flag "Low power mode", but I think Accessibility is important here. I prefer that my computer uses a little bit more energy than forcing my vision/eyes. So icons and text should be easy to distinguish in the tab, even if the "page" for the tab is sleeping.
Text and icon for all tabs remain easy to see/distinguish from the others.
Version 0.99.127.1-beta (WebKit 619.1.1) Build date Mar 26 2024, macOS Sonoma 14.4.1
Sonoma (14)