At one week of bottle conditioning (i.e. putting back-sweetened cider in bottles and letting them sit in my basement) I had no issues.
At three weeks, I had a bunch of leakage from the bottles while in the dishwasher. I lost maybe an inch or two of cider in a 22oz bottle that seeped out during the washing, on average. Luckily, I had no blow ups or caps come off.
Also, at three weeks, the cider was SUPER sparkling - more so than any champagne I have seen/tried. It would pour with a huge head and just went nuts - too much for me. It also went very dry while doing that - I think ~1.00 SG
I would suggest either using a secondary and get it to the SG you want or just bottle it VERY near the SG you want and then wash them in < 2 weeks.