Custom block (mobs can't walk on)

Hi all,

with the last update (2026.1) I have a problem (this was not happening with the previous updates)

I have a custom biome with a custom base block but my mobs do not walk on it, just they stand still without walking

I see now blocks do not have properties tab like before (like grass, dirt etc..) so how can I set my block to be "dirt" ? 

Also the TAG minecraft:dirt is not working (maybe now the tag for DIRT is different ?

Please help