With latest version of BluePower and QmunityLib (CurseForge) I've found this:
Flax crop grow ever higher!
Edit: This bug was present before the new release

Weird... Flax shouldn't have changed in the last release...

@amadornes This thing was present before new release, I waited this release to check if it was still present

Flax bugs should have all been worked out, maybe they got missed somehow. Steps to replicate?

@Quetzi Simple, plant a flax seed and use bone meal to grow!

Ok, I'll try take a look once I've put my PC back together

Thanks, and happy new year everyone!

Can I just check, do you have hunger overhaul installed?

Oh, yes,@Quetzi, it's hunger overhaul?

Yes, not much I can do about it, they change right click behaviour on plants.

Okay, Sorry for the mistake!