No I never found a solution, and no response from Apple.
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Same. Chrome is zippy as usual but Safari can take > 15 seconds to load many websites. Like zero activity for 14 seconds, then boom the whole page comes in the next second.
Same problem here. I fixed it by deleting my source control account from Xcode preferences, closing down Xcode, restarting Xcode, and adding my source control account again.
Yes this is a common design pattern and it can be very beneficial over trying to use a single instance of the CBCentralManager. You may also find it useful to subslass CBPeripheral multiple times as well.
It will depend on your app design and the mood of the reviewer. In my case, I have been submitting BLE apps for about 2 years now and I never heard any questions or requests from the reviewers concerning the BLE function. When I first submitted the app for review I included a short video showing how the BLE functions worked. I showed all the view controllers and button behavior etc. Each time I submitted a new build I included this video. In the comments I explained that I could provide hardware if needed.