The texture of the redstone repeater lever becomes strange

If you place a redstone repeater with a redstone comparator directed at it on its side, and then feed a redstone signal into the comparator, the repeater lever, which moves as the delay increases, will change the texture to a rectangular one with a bedrock color. The delay can be changed even after changing the texture, and the lever with the rectangular texture will move down, as it should be. The source of the redstone signal does not matter. I noticed this error back in version 1.21.0, but it also exists in version 1.21.22. Android version: 8.0.0 If this is not a bug, then forgive me.