Here's what I've done this morning.
1. Changed the symbol path to
srv*g:\symbols*Symbol information instead of g:\symbols
2. Changed parallel threads to 40.
3. Disabled parallel threads and symbol path set to srv*g:\symbols*Symbol information
After the second step the app was with a single dump finally finished within 40 seconds.
With the 3rd step I noticed that parallel threads should be enabled.
As of now, it looks like enabling parallel threads and changing the symbol path has resolved this issue.
I tested the number of parallel threads too, just in case, it looks to me like it doesn't make a significant change (changed 40 to 20)