I have been a faithful Garmin customer for over 10 years now. I had an edge predecessor and have had an edge 705 since 2010. It is still going strong and I do not need to replace yet.
So after spending 4 hours trying to use Garmin connect to sync a new route with my edge 705, I found a thread from a few days ago that had a response that it had been overlooked in the new Garmin connect version, it was "probably" down to the TCX format on the 605 and 705 and there was no estimated rectification date or guarantee of a solution.
Please do sort this quickly or I think many customers will become disenfranchised and simply abandon their garmin sports device due to lack of simplicity and functionality and use strava on their apple or android phone instead.
Here's hoping you can solve this.
Many Thanks