That's how its 'supposed' to work at 100% charge. I say supposed to because in a Tesla you loose all regen. In my volts there was no loss in regen. In my wife's bolt its reduced by ~ 1/2, but still has pretty good regen at 100% and its fully back by ~ 95%.My SR+ at the full charge today. 380 km and no regen.
Curious if your regen dots completely go away by 90% which is how mine used to work, but now it runs until ~ 80% with regen dots on and others have reported something similar.