hi @mihajlo !!
Welcome to our community 
The best place to ask for support on any hosted Weaviate instances that we host is here:
That’s because it will create a support ticket and we can take action right away having access to that instance.
Are you doing some sort of large ingestion? This can happen when the instance is quickly overwhelmed with a memory/cpu load at the instance.
So if doing a large ingestion, it is interesting to control the load and allocate enough resources accordingly beforehand (when possible).
Please, go ahead and open a support with our team, and we’ll be happy to help on this issue.
Thanks!