I use a Mac-mini (on Catalina) as DT sync server. On that server resides a large database, larger than 40 GB in size, 57643 items. The mac-mini has 4 sync clients: two DTTG devices and two DT devices. All sync via bonjour. The DTTG devices sync “On Demand” (shallow). Initially the sync worked fine, however lately the sync crashes DTTG at 57128 items on one device (iphone 8), and 35281 on the other (ipad 2018). This happens on both DTTG devices. There is no notice or anything, DTTG just disappears from the screen. After opening the DTTG app again the sync starts from the beginning, so this process never finishes.
The two DT devices both sync fine.
Any advice? Any way to diagnose the issue further?