How to reproduce:
1. Open user-submitted project (Repro_Shader_Properties) or tester-submitted project (Repro_Shader_Properties_NoSRP)
2. Select 'CaseA' and/or 'CaseB' GameObjects
3. In 'Textured Object' script Component try all 'Current Type' settings with Play Mode

Expected result: no errors are printed in the Console window
Actual result: errors are printed/spammed in the Console window

Reproducible with: 2017.4.29f1, 2018.4.3f1, 2019.1.8f1, 2019.2.0b7, 2019.3.0a7

Notes:
Selecting GameObjects 'CaseA' and 'CaseB' presents the following options in the 'TexturedObject' script Component:
1) MATERIAL_SET_TEXTURE - uses Renderer.material.SetTexture; errors are only printed once upon entering Play Mode
2) MATERIALPROPERTY_ BLOCK_SET_TEXTURE - uses MaterialPropertyBlock.SetTexture; errors are printed continuously upon entering Play Mode
3) NONE - uses CommandBuffer.SetGlobalTexture(in SetGlobalTexture.cs); errors are printed continuously upon entering Play Mode

The following error gets printed:
A multisampled texture being bound to a non-multisampled sampler. Disabling in order to avoid undefined behavior. Please use Texture2DMS in the shader.