Just as the title says. Tried Origins 1.3.1.13 on Forge 1.18.2. Made a stone platform, punched a hole, put tinted glass down in said hole and took no fire damage when standing underneath. Replaced the glass with a spruce trapdoor and I began taking fire damage. Tested with no other mods installed.

Works as intended, trapdoors aren't solid blocks, even if some variants aren't see-trough.