As Shown in the Pictures redstone can go up the blocks but is unable to go down the blocks this cant be a issue of them being transparent as seen in the pics
Linked issues
Attachments
Comments


MC-3311 is a very old bug report which is about 1.4 redstone has changed since than
That's true; however, that ticket is still closed as working as intended, and won't be reopened unless Mojang reconsiders. If you'd like to discuss more about this, I would recommend creating a post on the Mojira subreddit.

But MC-214374 wasn't resolved as a duplicate of it


added snapshot 21w08b as it affects it as well which is the moss block
Moss blocks are currently being tracked as MC-214374.

as shown in the slime pic slime blocks are considered TRANSPARENT which means if this was a WAI bug redstone should not have been going down the slime

Slime is transparent only in appearance its a solid block not transparent
Duplicate of MC-3311, which is working as intended.