I had germany not declare war on poland. It then started the war by finishing around the maginot line and attacking luxemburg............. not game breaking, but a little weird.
Germany declared war on Poland every time on my tests 24th Aug 1939, but never declared war on Soviet Union until 1945 (2 out of 4 times). Instead weird things happened after France were defeated. Soviet Union declared War on Turkey, Iraq, Iran and Afghanistan (1942) and wasn't able to defeat anyone of them until 1945. Germany did nothing after 1939 until 1945 except of spamming many,many,many divisions and defending Norway (*).
*1936 Scenario
Is it just me or is this a bug ? Don´t know.