There must be a bug about this, I noticed it to happen sometimes and already posted some requests...
However, consider that the skymasters are working to develop and release the new version of BM code ASAP, so it is likely they are not going to waste time (as they do that in their free time, and don't get paid for it... BTW thanks again!!! )on fixing minor bugs or malfunctions (e.g. some topics about observers, the routine of planes going on fire and getting fire damage etc.)