appUpdate events fired in reverse

I assume these are received in bulk, e.g. here with a simple logging callback:
```
Change 31220257 ; start of batch 1
Change 31220255
Change 31220254
Change 31220253
Change 31220252
Change 31220250
Change 31220249 ; end of batch 1
Change 31220265 ; start of batch 2
Change 31220264
Change 31220263
Change 31220262
Change 31220261
Change 31220260
Change 31220258 ; end of batch 2
```