Especially on small circles like 200m track. Look on the image! Actually, it is the worst image I ever seen on Strava! Compare my new 5 plus (on the top) and iPhone (bottom). Even cheapest Android costs 10x less than Fenix has much better GPS performance. Even my old Vivocative HR had MUCH better tracks. Now I shame to publish my runs from my 700 euro device, they look just terrible. I can't understand how Garmin was able to make a product with SO bad performance of its MAJOR feature.
до покупки F5+ пользовался 735,проблем с GPS не испытывал, решил взять F5+ и пожалел, через раз получал трек (вид занятия бег) как на картинке обведённой жёлтым, дико бесило, но нашёл причину плохих треков…
The reason why I publish this is my hope that eventually Garmin will hear us and finally will improve GPS performance. I have read that Polar made great FW GPS-related improvements so now they works nearly…
Are you in Russia? What latitude are you at? Have you tried GPS + Glonass instead of GPS + Galileo?
I ask because Glonass is supposed to have an advantage at high latitudes because the satellite orbits…
Wow, this is really interesting. I'll definitely try.
Worth to mention that I discovered that some laps looks better than others; exactly in same run, same time, same location, same pace - basically, same everything. Compare 4th kilometers vs. 7th kilometers. That is hard to explain.
Бегаю везде, где бываю, чаще в Екатеринбурге и Москве 
I have the same one. I put my old 735 in the pocket and they showed me better track. And the same in open water swim also. Old 735 - better.. 
I’ve tested all modes and setting, and every time - bad.
F5+
735
I checked out 400m track in Moscow and should admit that it looks pretty nice, no complains.
Based on my Parkrun experiences, sharp turns seem not a problem as well.
Problematic tracks are under the open sky with no tall buildings around, so they don't cause a problem.
So I can conclude the core problem is in quick and often changes in running direction.
