I created a sandbox world to test the temporal tear. When entering the tear the first time everything was fine (there is only a sound bug after clicking "proceed", spoiler below)
Sound bug: After the last message of "the great escape", clicking on the "proceed" returns you to the colony but all UI sounds are disabled. There is no click, bip, blip sounds after clicking or hovering on buildings.
I saved just as the rocket was on the tear tile. 1 out of 2 times I load the save, it crashes the moment I hit the button to enter the tear. The other time it runs normally and there is the sound bug at the end. I couldn't crash or run the tear sequence normally two consecutive times. One time it will crash, the next it will run normally. (maybe it's a "correct click" coincidence? I don't know...)
Open save. Unpause. Locate tear on the starmap. Enter tear. If it's a success, repeat and enter tear just after unpausing.