Converting Texture to Virtual Texture Breaks some Materials in the Starter Map. How do I fix it?

Development Asset Creation
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In UE 5.5.1, I opened up the Starter Content’s Starter Map and tried changing all the textures to Virtual Textures just to test things out (I only recently found out about this feature) . Most of the Materials converted properly but 4 of them had similar Issues.

Before:

yIerx2N
yIerx2N1131×709 56.1 KB

After:

4YPfuwC
4YPfuwC1169×770 63.5 KB

If I convert either the _D or _M Imgs back to normal textures then it fixes the problem.

I tried checking the materials but haven’t been able to find a common issue.

Is there a way to fix this issue without reverting them back to normal textures?