Deepslatee redstone ore blocks won't turn off after being lit, no matter how much time you wait(it affects both stone and deepslate ores).

Steps to Reproduce:

1. Place deepslate redstone ore in the world
2. Interact with the block(e.g. walk on it, right click it, throw Bottle o' Enchanting at it, etc. etc.) so that it will turn to it's lit state
3. Wait and see that the redstone ore won't go back to it's unlit state, no matter how much time you'll wait

You can automate the process of "watching" the ore changing state back to unlit by placing the deepslate redstone ore, lit it by walking on it, place an observer such as that it's face is facing the Redstone Ore Block, no space between the two, and then place a copper bulb on the observer output, in this way when the block will go back to it's unlit state the bulb will get turned on(but it won't happen since the deepslate redstone ore won't go back to it's unlit state, unlike the normal redstone ore)

I've attached an image of the previous described circuit after a couple of minutes of time from being built, as you can see the redstone ore will get back to it's unlit state, thus activating the bulbs, the deepsalte one won't.

To fasten things up  you can increase random tick speed, since redstone ore going back to it's unlit state when the block get updated by a random tick.

Observer Results:

No matter how much time you wait Deepslate Redstone ore will not get back to it's unlit state.

Expected Results:

Deepslate Redstone ore is supposed to go back to it's unlit state as normal redstone ore does, after a certain random amount of ticks.

(I apologize for my poor english, but I'm not a native speaker)