No Synch with Bluetooth Connection

I have already described my problem once before. There was no solution, so I am trying again.

If I add routes using Komoot while on the go, or modify existing routes, and subsequently synchronize the Karoo with my mobile phone via Bluetooth, these routes do not appear on the device.

Account synchronization is, of course, enabled. The routes appear on the app's dashboard. I need to set up a hotspot on my phone and establish a Wi-Fi connection on the Karoo; once that is done, the routes are synchronized.

I use a Samsung Galaxy S24 Ultra. All devices and apps are up to date, but the problem has persisted for quite some time now, so recent updates offer no help here.
Is anyone else experiencing this problem?