This has actually happened at least since 1.16.230.50. Anyways, this texture bug seems to be very easily fixed, generally just by reselecting one of the items already selected, or by changing one.

I'm not entirely sure how this is reproduced, but it only seems to happen on startup. 

Expected results:

Textures are all as intended on startup, every time.

Observed results:

At least sometimes on startup, textures are slightly messed up/corrupted. The corrupted areas seem to not be the same every time, but I have only taken screenshots of one instance