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Oh, it's not 1.5 Rollback, it's 1.9.5! That changes quite a bit (especially considering that there was indeed a bug like that in 1.5.x era)
I've looked at the save and talked with Wiz, he said he has just found the cause for this while looking at a different issue. So this should be fixed in the next patch, though we're not 100% sure when exactly will that be.
Basically the AI updates the weights for private investment too rarely, so with your construction capacity, AI would continue queuing a single building as all its evaluations would ignore the buildings that are already queued. One of the things that updates those values is queuing any government construction, but that would still only limit the effects of this bug, since all construction started on a single daily tick would be selected based on the same values.
The title claimed it was 1.5 (I changed the title to make it less confusing for other people that would see the thread). And 1.5 rollback is actually available.
This is handled in code, unfortunately it's not possible to fix through mods or though file modification. Making sure to queue any government contraction every week limits the severity of the issue, but it's probably too tedious to be feasible.