With OS beta 7.1.11 I - and others! - met the weird problem of loosing a performance rig - and magically see it restored the other day. Yesterday I re-edited a performance (which I found lost the day before, but also reappeared later), saved it with the Save button on the profiler stage and shutting down the machine. This performance rig was thought to be tested with the band's rehearsal in the evening. Well, after booting the Profiler at rehearsal room, it selected the right (last) performance number, but, oh boy, what I found there was just a copy of performance rig#1. Magically it was copied to #17.
Now, I read in german FB group, others had this problem also. One guy said he did know this also from the latest NON-Beta. And they also reported the magically restore of lost rigs.
Anyway, I consider this the worst problem with the current version. Loosing data in IT system always always was considered catastrophic event, the worst thing that can happen. It does not help in production environments when you get the data back the other day at home, because you are expecting to work with it in production (even it this is just a hobby band rehearsal).