"Inactive" message

I am constantly playing HOTS for the past 2 weeks. This morning when i was in queue for a ranked game while i was silver 2 with 178 points, the game threw me out of the queue when i was ready to pick a hero. I surely had 10 seconds left and suddenly i got the message " left because of inactivity".
I wasn’t inactive and i had time left! And suddenly of course it’s like i lost 2 games.Demoted just like that. I would prefer you do something about it please.I am a customer of yours for 14 years and this is surely not right.

Thank you for your time
And thank you for the measures in advance