Dream C Club Portable missing background

[benderscruffy]

Game or games this happens in

Dream C Club Portable ULJS00333

What area of the game / PPSSPP

as you talk to the first lady the background is missing

here is a GE dump ULJS00333.zip

What should happen

here is how it should look

Logs

ppsspplog.zip

Platform

Windows

Mobile phone model or graphics card

AMD RX 580

PPSSPP version affected

PPSSPP v1.13.1-247-g3edaeae81

Last working version

No response

Graphics backend (3D API)

Vulkan

Checklist

• [X] Test in the latest git build in case it's already fixed.
• [X] Search for other reports of the same issue.
• [X] Try resetting settings or older versions and include if the issue is related.
• [X] Try without any cheats and without loading any save states.
• [X] Include logs or screenshots of issue.

[unknownbrackets]

This seems to be a depal issue. Introduced in one of these commits from a quick bisect (#15789):

4e3c2581404fceb65b2f15096b267ae2f0db005d 81c36578ca78f0b68e5b5e829573a1e316053caa 92a3d4534021f7f12881b4b3e46dbc1af12ef700 b5597d10134d9c084b7450136a703036187cf032 45def772eeb3ed908ebb9cd478504db8ffd80461 de10c1fddd18ed09a89c5883dc9b87509f2da4f4 87b128ecaf1e98b156613544d39e69957036aa5a 9a5893ce6ef79fcf8185d07198c9da60f7b0c6f9 ded8ba8806b7818457ad7b705046136d6fb2fc2b

The source framebuffer shows transparent in these areas in the GE debugger when texturing from them (but it is using a CLUT.) It has both alpha test (> 0) and standard alpha blend, but it ends up drawing a solid brownish color.

-[Unknown]