**System Information**
Operating system: win10 64
**Blender Version**
Broken: 2.81
**Exact steps for others to reproduce the error**
Add //Dynamic Paint (Canvas)// to any mesh and try to set 0 as a start frame of simulation.
1. Open file and see how Displace modifer doesn't affect mesh
2. Run animation -> bake current cache
3. First problem: see how weight is empty at the mesh origin (Displace modifier works except begining of animation)
4. Second problem: return to frame 0 -> weight doesn't updated to original values (Displace modifier still active on vertex group)
{F7758363}