Not sure how to reproduce this crash, but get another guess about what could have caused him. It could be auto-transfer replays of every level to workshop. Maybe not.
But by the way, this feature is not quite successfully implemented (in my opinion). After I passed a level a dozen times in an attempt to understand what caused the error, I switched to the activity list of the steam, and found that it was almost completely packed with first-level replays from the workshop. Because of this, the information content of the tape suffers, since Replays do not stack in one post and have to scroll for a long time in search of the right thing, and this can also cause some friends discomfort. Just expressing an opinion

Replays do not stack in one post and have to scroll for a long time in search of the right thing

What do you mean?

When you got 5, for example, screenshots from the game, and save them - it activity list they are shown like 5 screenshots in one post (1 big and 4 smaller for example) not one under another.
Workshop replays dont stack in one post, they shown one under another. As far as I understand it does not work the way it works with screenshots. And when you try one level many time to get best result (like better weapon to the next stage), and got better stage-time every next time, you always got workshop uploadings list in activity. It works like this, and otherwise it is difficult to implement because of the binding to the workshop. The function is good, but it brings more inconvenience than good, I think (by the user).
Optionality or the ability to install a previous version of the game would be a convenient function to avoid inconvenience with the workshop for those whom it interferes