At level cap some champions have a yellow upgrade bar while others have gray

[Nomad7]

The way the bar between the champion's gear and the upgrade button displays when champions are at level cap is inconsistent.

Steps to reproduce:

1. Upgrade several champions champions (with the increment set to Upg) to level cap
2. Observe the bar showing the champion's level for the various champions at cap

Expected results:
The bar appearance should be consistent across all champions at cap.

Actual results:
Some upgrade bars display yellow (full?), some display black (empty?).

Notes:
Relaunching the game will cause all the upgrade bars to show as yellow/full.

[Nomad7]

Just anecdotally (based on like two tests), the bars seemed slightly more likely to turn yellow when upgrading via manual clicks, while familiars appeared to have a 50/50 chance of the bar being yellow or black at the level cap.