Juno 106 dim 'always on' front panel LEDs

Working on a Juno 106 restoration project with the Gravitational Slingshot upgrades. All is well with the synth excepting one minor issue. Certain front panel LEDs are very dimly lit all the time–Chorus I, Range, and Poly II. It’s very subtle.

Everything was thoroughly calibrated, and the pitch and filter track perfectly.

Curious if anyone else has seen this and might suggest a path for troubleshooting.