System Information
Operating system: Windows 8.1
Graphics card: GTX 1070

Blender Version
Broken: 2.79b, 2.80 and 2.81 2019-10-27 9b6aa740be31
Worked: never(that i know of)

Short description of error
adding keyframes to the rotation values on a particle system makes those values unchangeable and they don't affect the particles during animation

Exact steps for others to reproduce the error

1. create a plane
2. add a particle system
3. set to hair and enable advanced
4. add some other object and set the renderer on the particles to that object
5. enable rotation and play around with the values (Randomize, Phase, Rotation Phase)
6. keyframe those values then move to a different frame change them and add another keyframe
7. Observe as nothing happens on screen

8 try changing the values ane observe that nothing happens unless you delete the keyframes

note
they stay like that during render not affected by the keyframes

also same happens when setting collection instead of object

blend file
2.80: