Deepslate redstone ore & bucket of water

Unable to pour a bucket of water next to a block of deepslate redstone ore block to extinguished a block of lava.  It wont allow me to pour water on the Crosshair as shown on attachment.  I kept trying but nothing happen but it allows me to pour water on the other 4 sides of obsidian, just not on the deepslate redstone ore.

Please email me if there is anything else I can provide, I will be more than happy to help.

Thank you for your time.