keys are not well gossiped by EW

**Describe the bug**
Assuming I'm using this account only with EW, we observed that the keys are not gossiped by the web client and this case is not well handled on EI. Here is my status when restarting the app:

- MXSessionStateInitialised: crypto.backup.hasPrivateKeyInCryptoStore = NO / crypto.backup.enabled = NO
- MXSessionStateStoreDataReady: crypto.backup.hasPrivateKeyInCryptoStore = NO / crypto.backup.enabled = NO
- MXSessionStateSyncInProgress: crypto.backup.hasPrivateKeyInCryptoStore = NO / crypto.backup.enabled = NO
- MXSessionStateRunning: crypto.backup.hasPrivateKeyInCryptoStore = NO / crypto.backup.enabled = YES

This should be investigated further or on web client side, or on iOS side