Unable to issue Drag and Taxi in RKSI

Device: IPAD AIR 3
Operating system: 17.4

The Drag & Taxi is unable towards to 16B/34B.
By the way, 15B/33B’s D&T is able.

Can you drag an aircraft some some taxiways turns red? This way we might be able to detect the problem within the network

I have run the network check in the airport editor and couldn’t identify any issues from any start location.
Also the taxiway the aircraft is on in the picture above is valid for class F.

From an airport editors perspective everything is fine.

May be someone from IFATC can try to narrow the issue.

Tom
IFAET


Edit:
It works in general



Might be a performance issue.

Try clearing the scenery cache, and running IF only

Thank you 😊