Mangrove roots conduct redstone signal, unlike other transparent blocks

The bug

Despite their transparent appearance (similar to leaves), a redstone signal will pass through mangrove roots (this is not the case with leaves).

To reproduce

1. Place one redstone repeater facing into some mangrove roots, and one repeater facing away it.
2. Power the first repeater

Observed behaviour

The second repeater becomes powered, as the mangrove roots are able to be powered by the repeater.

Screenshots