Hello:
The same thing has been happening to me for the last two or three days as well, after a long period with no issues (when the previous TP bug was fixed). It's happened several times, from/to different regions, and always leading to a disconnect after the tp fails. Here's the info about the last one:
When it happened; this doesn't have to be exact - Saturday, July 13, 8:40 pm, SLT
Where were you when you tried to TP? - Tempura
Where were you trying to go? - Mirromere
If you ended up somewhere else, where was it?: - n/a
Were you disconnected or did you crash? If the viewer window disappears with no message, you crashed; if not, you were disconnected. - I was disconnected
What viewer were you using? (copy the information from Help > About Second Life) - Firestorm 5.1.7 (55786) Jul 13 2018 20:00:04 (64bit) (Firestorm-Releasex64) with Havok support