Germany declares war on Poland then 5 seconds later Bulgaria declares war on Australia which results in the Axis forming immediately Italy,Hungary and Greece for some reason which throws events that require said countries to be not allied to Germany and not at war to break
It never happened to me, perhaps you have attacked someone earlier ahistorically which usually cause these kind of wierd things.
However it reminds me of the Hungarian decleration of war on the USA in real life:
Amercian: 'Is Hungary a republic?'
Hungarian 'No, it is a Kingdom'
Amercian 'Then you have a King'
Hungarian 'No, we have a regent who is an adimiral'
Amercian 'Then you have a Fleet'
Hungarian 'No, we do not have any sea'
Amercian 'Do you have any claims, then'
Hungarian 'Yes'
Amercian 'Against Amercian'
Hungarian 'No'
Amercian 'Against England'
Hungarian 'No'
Amercian 'Against Russia'
Hungarian 'No'
Amercian 'But against whom do you have these claims'
Hungarian 'Against Rumania'
Amercian 'Then will you declare war on Romania'
Hungarian 'No, Sir. We're allies'