Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: AMD Radeon HD 7600M Series ATI Technologies Inc. 4.5.13422 Core Profile Context 0
Broken: version: 2.82 (sub 6), branch: master, commit date: 2020-01-08 05:34, hash: rB010c551257d5
Short description of error
with more complex scenes (such as for example blenderman file https://cloud.blender.org/p/gallery/57e5084f0fcf294119c5055c) once you render an image and you have eevee in render preview mode, moving the render window becomes very slow, probably because eevee returns to refreshing the previw render without needing it.
Exact steps for others to reproduce the error
see the video