I was completely wrong, this still isn't fixed.

I meant 5.3.2p3

Just noticed this was fixed in the latest 5.3.1p3 release!

Hopefully this will be addressed ASAP.. this is breaking bug.. Can't release preview version until this is fixed

Issue appears on 5.3.2p1
There are two problems happening when changing the resolution of textures realtime:
1. When changing from "not-full" to "full", the standalone build crashes. There is no problems in the editor.
2. When chaniging from "full" to "not-full", some of the ui elements (especially those that are builtin the editor) in the standalone build get corrupted. No problems in the editor.
Workarounds:
1. setting tex res in all quality levels to full.
2. allowing to change tex res only before starting the game.

Confirmed issue in 5.3.1p3

This impacts our ability to scale the game perf based on user changing quality settings.

I have the same issue "unity trying to reload asset from disk that is not stored on disk", changing quality settings at runtime to a setting with a different texture quality (in this case going to half-res from a default of full-res). Quality level definitely included in the build for that platform (windows standaone, x86-64). Not changing texture quality, the error doesn't happen so we're doing that for now.

This got same problem, but if change Texture Quality from HALF to FULL.
From FULL to half - working!

UPD: correct. From HALF to FULL game crashed (Standart Windows 32bit EXE)

Same error, messes up RTPv3.

Same problem, same error "unity trying to reload asset from disk that is not stored on disk". I hope it gets fixed soon.