[core] Fix calculation of delayed transitions

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mbgl/style/paint_property.hpp b/src/mbgl/style/paint_property.hpp
index 15df2a77c7..7b56f6415d 100644
--- a/src/mbgl/style/paint_property.hpp
+++ b/src/mbgl/style/paint_property.hpp
@@ -45,6 +45,9 @@ public:
             // Transition from prior value is now complete.
             prior = {};
             return finalValue;
+        } else if (parameters.now < begin) {
+            // Transition hasn't started yet.
+            return prior->get().evaluate(parameters, defaultValue);
         } else {
             // Interpolate between recursively-calculated prior value and final.
             float t = std::chrono::duration<float>(parameters.now - begin) / (end - begin);