q.delta_time returns 0 in particle contexts

The bug

The q.delta_time molang query silently fails and returns 0 when it’s used during rendering of particles. When rendering geometry, it returns the intended value.

How to reproduce

1. Download and open the attached world

2. Hold the two different items in your hand and look at the display on your screen and above the frog

Expected results

The “q.delta_time” line should always display a non-zero value

Observed results

The line displays 0 in the particle display