Yes. And there is another related leak because the GraphicStateList, a TFPList, does not free its elements. Committed a fix to Laz/main.
A further leak probably is due to FAssignedFont which is auto-created at first access (GetAssignedFont), but never destroyed. However, I did not touch it ATM because I am not 100% sure about font handling in TLazCanvas which probably should get the fonts via FreeType.