Problems with Round-Trip Course

First of all sorry for my english which is not so good...

I got my Fenix ​​5x last Thursday and it replaced my Fenix ​​3 that I had for two years.

On my first running I wanted to try to do a round-trip course with my Fenix 5x. Target was 5 km and the Fenix ​​calculated three options where 5.5 km were the closest. I started the course and to my disappointment my Fenix navigate me to run across fields and climb over houses. The area is built seven years ago. It also marked out trails that were not available. Afterwards it corrected its mistakes but then the round-trip course became one kilometer longer.

Yesterday I tried the round-trip route again. This time it was also wrong. First it navigates me to a trail that don´t exist. Later the Fenix wanted me to cross a high-speed railway. There was a road that ended on the other side of the railroad, but on my side there was no way. I continued to run along the road that was parallel to the railway. The Fenix tried to correct the course, but was not correct. At first it navigates me to run on the railway track. The Round-trip course was not fun at all, most confusing. The railway has been there for at least 20 years.

My settings are the latest software 4.10. all maps is on (Topo, basemap and cycling). Both Glonass and GPS. I live in Sweden.

Anyone who has suggestions on how to solve this? I have contacted Garmin's support via mail, but they have not answered me.

I tried to do a new round-trip course today, but today the Fenix tell me it´s not able to a round-trip-course because of there are no courses avalible in my area.