Trying to drag & drop sometimes is reset multiple times during drag with mouse Logitech M510 on macOS Mojave and Catalina. This issue is new, I can reproduce it switching macs, usb receivers. Using a M705 mouse seems to work fine.
Report from Logitech Unifying software, using original Unifying Receiver dongle:
Logitech Unifying Software 1.3.375
Mac OS X 10.14.6 (18G8022)
Unifying Receiver @ 14100000
Product ID: 0xc52b
Firmware version: 12.10 (32)
Location ID: 0x14100000
Bus enumerator: -
Hash: sanitized
Devices: 2 (1 mice, 1 keyboards, 0 number pads)
Mouse M510 @ 1
Product ID: 0x4051
Subclass: 0x2
Bitfield: 0x4
Serial Number: 0x4051sanitized
Connection status: active
Location ID: 0x0
Receiver location ID: 0x14100000
...