Not able to sync a viewing key that's not imported?

[zenodeapp]

I really don't like to create so many issues.
But this comes from #2711, where I go through potential MASP improvements and have to treat the following as a separate issue.

Is the "issue" below a bug or expected behavior (or third, I screwed something up and it should've worked 😂?). If it's intended not to work, then it would save lots of time to not allow the sync in the first place.

[...] By the way, I tried to sync a viewing key I did not own in the CLI. This went through the whole chain, but as soon as I again ran the sync it started all over again! Isn't it possible to perform a shielded sync for a not imported viewing key? Asking this for trying to manoeuvre through the building of the IBC app. [...]

Originally posted by @zenodeapp in #2711 (comment)

[phy-chain]

Given the way the shielded context works, I would assume that this is normal. You can as many spending/view keys to your shielded context I think ? So if you sync for a specific key, the sync goes through the whole history, and gather data for that key, then add it to the context.

[cwgoes]

cc @batconjurer Is this particular issue fixed by your shielded sync work?

[batconjurer]

cc @batconjurer Is this particular issue fixed by your shielded sync work?

yes