Hello Piotr,
Thanks for reaching out to us with your question!
I’m sorry about the unusually long wait for an answer, but the whole team was out last week and new we are catching up.
I checked that thread you mentioned and your issue. At the moment there is no other solution for that, then updating it manually.
Of course you can do it manually but then for what you need global stock?
Different users use it in different ways. And a global stock – even if it needs to be updated manually – enables you to sell only X number of several different tickets to one event, if you have a limitation like that. For example a dinner party for a 100 people where you have veggie meals and meat meals. You don’t limit them separately but you only have a 100 places.
I hope this clarifies. Let me know if you have any other question.
Cheers,
Andras