There are two event quest lines which bug very often preventing your map to reach t4 during day time:
The event with the 6 vines (one of the last 3 of the pact chain)
The faren event chain (already bugs before unblocking the way point)
Please fix these as soon as possible. Every 2nd T4 day run I organise gets ruined by this. If you cannot fix this fast temporarily lower the amount of events needed to reach T4.
1st person worldwide to reach 35,000 achievement points.