After the removal of the pre-splitter it appears that under some
circumstances the bolt11 annotation may not be applied to HTLCs
being sent. This in turn means that we have the invoice while
performing the payment, but will forget it during a restart.

I think this may be related to the pre-splitter, but we may need to
look further.

Context:

• GL session_id=7148941103595520
• Version v23.08gl1