C2O - monitored folder number of items limit

When I start C2O with configuration to monitor a folder, and the folder has few thousands items in it, I get an error 'Out of memory and resources' and the folder is not being processed. This happens to me with DW7.1, Outlook 2016 (tried both 32 and 64-bit)
Before, with DW6.8, C2O could monitor a folder that had several thousand items in it (8K or even 10K items)
This capacity seems to be lost in newer versions.

Has anyone else experienced the same?
Are there any 'tricks' to raise the limit of items in a folder C2O can handle? 

Dear Josef Zayats! It looks like the Community cannot answer your question. Thats why we have opened a Support Request with the Number SR-113531-Q2V5R for you. A Software Support Specialist will contact you directly to follow up. We will update this thread with the solution as soon as we have solved the Support Request. With Best Regards, DocuWare Support Team