Your best way forward is to show that ping plot to your ISP
That packet loss and errors that start to appear after 10.10.70.1 and continues to the server IP is likely what is causing you trouble
that 10.10.70.1 is a private network space and is upstream from your ISP the issue is likely across that link between whoever owns that hop6 and into the telia backbone
I can only comment on what i see in the pingplot, any packet loss will affect real time applications as seen, web browsing etc will remain unaffected.
This is a good link close to what you have displayed , that article mentions 2% when in reality any packet loss will have an affect if it carries through to the final destination.
Maybe try www.wtfast.com free trial just to test with, and see if there is any change to what occurs, it will also provide a comparison on the condition of the original route
