System Information
Operating system: Mac OS X and Windows 10
Graphics card:
NVIDIA GeForce GT 750M 2 GB / Intel Iris Pro 1536 MB (mac)
NVIDIA GeForce GTX 1650 (windows)

Blender Version
2.83 Beta, eaee2b411935, 2020-05-10
2.90 Alpha, 51ac411ce80c, 2020-05-10

Short description of error
Image textures do not display in sculpt mode when using MultiRes modifier but they do display in sculpt mode when not using MultiRes.

Exact steps for others to reproduce the error
Open default startup file.
Change Render Engine to Eevee.
Change Viewport Shading to Material Preview mode (or Rendered mode).
Select the default cube and add an image texture to the base color of the default material.
Notice that you can see the image texture on the default cube.
Select the default cube and enter Sculpt Mode.
Notice that you can STILL see the image texture on the default cube.
Add Multiresolution modifier.
Click Subdivide.
Notice that you can no longer see the image texture on the default cube.