GPU lightmapper reverts to CPU while baking APV

Steps to reproduce:

1. Clone Modern-Sponza project from GitHub;
2. Additively load Sponza and SponzaLightingDay scenes;
3. In the Lighting window, select Probe Volumes tab;
4. Make sure the Min Probe Spacing value is set to 0.5;
5. In the Scene tab, make sure that Lightmapper is set to Progressive GPU;
6. Generate lighting.

Expected result:

• Bake finishes successfully on a GPU.

Actual result:

• Lightmapper reverts to CPU (see [Internal link]). No warning is printed in the console nor the editor log.

Notes:

• Reproduces in: 2022.1.24f1, 2022.2.5f1, 2023.1.0b16;
• Doesn't reproduce in: 2022.3.7f1, 2023.1.9f1;
• Reproduces on Windows;
• Observed using NVIDIA TITAN V and AMD RX 580 GPUs;
• Doesn't reproduce with NVIDIA 3080;
• Only affects the GPU lightmapper;
• Doesn't reproduce when using sparse probe volumes (when Min Probe Spacing is set to 1 or higher);
• System memory (RAM) usage spikes right before lightmapper reverts to CPU.