Operating system: Windows 10 Pro
Graphics card: Intel UHD 630
Blender 2.80, 893fa598319e,2019-02-24
Animate property feature keeps resetting object position, rotation, scale.
Step 01: Loading new default Scene.
Step 02: Select Cube object go to property position, rotation, scale.
Step 03: Add initial Key frames animation from the Animate property buttons with click+drag.
Step 04: Go to random place in timeline.
Step 05: Add second set of Key frames animation from the Animate property with click+drag HERE object position for example is reset and only first key stroke is registered other aren't. That leads to other two property get reset to last key frame added.