Describe the bug:
Tried to grind a full stack of 'lazurite' on a regular grindstone - but no joy.
Also tried a full stack of Rough Diamond on the appropriate Diamond Grindstone - no joy.

Versions: (BEFORE SUBMITTING A BUG REPORT, make sure you have the most up-to-date versions of Spelunkery, Moonlight Lib and Supplementaries)
Minecraft version: 1.20.1
Spelunkery version: 1.20.1-0.3.15
Moonlight Lib version: 1.20-2.13.48
Fabric API / QSL / Forge version: 47.3.13

Other mods:
JEI: 15.20.0.106

Logs:
Even if the game does not crash they may be useful!
Please provide the following logs:
From .minecraft/logs : "latest.log" as well as "debug.log" if it exists. From .minecraft : "launcher_log" as well as a
file that starts with "hs_err" if it exists. Note: Double check that the logs are from the correct time. ex, don't give
us a log from a month ago because you forgot to check the date.

latest.log

I do not have the other logs. Alas.

To Reproduce:
Steps to reproduce the behavior. Format it as a numbered list of steps.

1. Load up a fresh Creative world with Cheats enabled
2. JEI to get Grindstones and Rough Lapis/Diamond
3. Attempt to grind a full stack or partial stack, at varying distances, shift - right clicking, getting more frantic as you go.

Expected behavior:
Expected stack to convert - and relevant drops/xp appear

Screenshots:
If applicable, add screenshots to help explain your problem. https://screenshot.help/

Additional info:
I initially thought this was a compat issue with other mods like Carry On, Pickable Pets (as they both use the Shift - Right Click to interact with blocks and Entities - but having nuked an instance down to clean and loaded the above mods I cannot get the interaction to work. I have also tried with the gamemode set to survival just incase that was somehow relevant.

I also cannot grind a 'block' of rough lazurite etc. The Wiki states:
"You can grind any Rough Shard, Gem or Block and always receive the proportional amount of xp and items"

But the blocks do not have the 'Grindable' tooltip in game. So not sure if that is supposed to be a thing.

I checked the open/closed issues and also the Discord, I can see some other people have occasionally had some weird interactions with other mods, but no one else has hit this wall. I also checked the configs to see if its something player has to enable, I am truely at a loss to how this has happened.

working as intended, bulk grinding as well as grinding blocks and shards was removed

Understood - thanks for confirming!