BUG: QMB particles disappear after toggling gl_no24bit back and forth

[hemostx]

ezQuake version:
3.6, happens back to 3.2.3 and 3.5*, so maybe even back to 3.1?

OS/device including version:
W10 20H2 GTX 1070 472.12
glsl/std alike

Describe the bug
When switching through gl_no24bit 0 gl_no24bit 1 gl_no24bit 0 at runtime (incl. required vid_restarts), the QMB particles nearly completely disappear when coming back to 24bit mode enabled.

To Reproduce

• bare ezquake install (incl. media and particlefont!) with nquake's textures.pk3 and models.pk3 to have some reference
• near default config, gl_part_trails 1 config.cfg.txt

1. start a map and pickup some weapons (RL is a good one)
2. shoot weapons where the config has QMB particle effects enabled. Enjoy the smoke puffs, tracers and other niceties.
3. gl_no24bit 1;vid_restart
4. we now have (hopefully) classic visuals. shoot the same weapons to witness the classic effects that ezquake correctly reverts to.
5. gl_no24bit 0;vid_restart
6. shoot the same weapons. Example results: boomstick impacts completely missing (tracers can appear though), rocket trail showing very sparse particles.
   
   I have crashed a few times in that degraded state (screenshot), I can't get it to happen reliably though.
   
7. reload/start a map and the QMB effects work again.

Expected behavior
Re-enabling 24bit textures should reinitialize QMB effects, as happens when reloading the map. The engine is able to fallback cleanly to particle effects but can't quite seem to go the other way without a more thorough reset like a map load.