Topics created by frustration

Make sure the battery saver is off at the URL opera://settings/batterySaver.

Make sure you're not using any of the limiters in the GX Control sidebar panel.

Make sure "Snooze inactive tabs to save memory" is off at the URL opera://settings/userInterface.

Disable the flag at the URL opera://flags/#calculate-native-win-occlusion.

Install https://chromewebstore.google.com/detail/disable-automatic-tab-dis/dnhngfnfolbmhgealdpolmhimnoliiok.

Then you should be good to go.