Harold Boomer

There has been no resolution provided and all linked duplicate forums have been no help either.

I have the same problem, however, it is only after exploration of a world- (when some moderate changes to the environment are made) that the game takes an incredible turn for the worst, and resets my world as if reloading the save every couple of seconds. Thus blocks reappear and/or can't be picked up, positions and time is reverted upon reopening the save after exiting the session...
As far as I can tell, there is no performance lag in my situation as I can max out all the (visual) settings without any faults appearing on any newly created world.

Crash report and a copy of the faulty save attached.
Have since attempted to open this world on multiple machines with the same results as reported above.