Diablo III's current PTR, 2.6.10, hasn't been a smooth experience for all players, with some reporting issues with logins and latency. Now, Blizzard has announced that the PTR will be extended "for an unspecified amount of time" while they test some changes with users.

Blizzard is encouraging players to jump into the PTR to help with testing, and has announced two changes that have been made. The Shadow Clone seasonal theme has been temporarily turned off, and will likely be back on by some point on October 14; once it comes back on, the fourth slot in Kanai's Cube will be disabled. It will eventually come back, too, but only after some further testing is completed.

Blizzard is planning for more testing beyond this, too, and will update with further details when they know what other changes are going to be introduced. Seasonal themed content started coming to the PTR earlier this month.