Since I've been using the mod, I've found several bugs with, among other things, Painted Blocks (fabric 1.20.1)

1. Painted Inventory Cable Connectors are not translated:

2. Framed Inventory Cable Connector items do not have a frame:

3. The border of the Painted Blocks is transparent (you can see the gold blocks through it):

4. Painted blocks show no break animation and the wrong particles, ignore break speed and blast resistance. Maybe you should be inspired by the code of Create mod copycats:

The blocks are painted, so it shouldn't have the same hardness, or resistance.
The see through issue is a vanilla issue, you can see it with redstone lamps, ice and any translucient blocks.
I fixed 1 and 2 in the 1.21 versions.

Thanks for the fix.
The hardness and resistance actually makes sense (and also saves some coding). Why are all Painted Blocks translucient anyway?