What Edition of the mod are you using?
Bedrock Edition addon

Describe the bug
Some seeds will not place, on farmland and/or grass.

To Reproduce
Steps to reproduce the behavior:

1. Grab seed (i.e. onion seeds)
2. Place the seed on the grass and/or farmland.
3. It will not be placed.

Expected behavior
The seed will place the crop, bush on their favored block.

Desktop (please complete the following information):

• Minecraft Version: 1.16.201
• Mod Version 1.1.5
• OS: Windows 10

Should be fixed in v1.6.0. You can download the latest version via MCPEDL

Should be fixed in next version