there is a random event (don't remember exact text) of issue with power supply or generator or such, by that for a limited time the city has no energy and some buildings have to build new.
Now I have two cities where, after such random event, I have the telegraph to build new, needs 1 turn, and several other buildings not working because no energy.
But building or telepraph does not work. It comes again and again.
(while the random period happens, I cannot hurry it, but now I can, means, the random time is over and rebuild should be possible, as it had been with the other cities before, and the log entry related is several years before.)
So I think that is a bug.
sav attached
Edit
in log file there is "you have build in city ... the telepragh bureau", and it got off from building list, but it is shown again as to build and city stall has no energy.
this is any turn. Confirmation of building but still shown as not build and no energy for city
Edit 2
now for one city come the message that the energy is back.
So the diffference (and maybe bug) to the former events is, that in this case I hav the option to hurry the building (and it generated the building confirmation althought it got not build) , while before, when the energy was interrupted, I had no option to hurry.