Looping over a copied list of keys, to prevent mutating tvars_cache while iterating
Looping over a copied list of keys, to prevent mutating tvars_cache while iterating

(cherry picked from commit 0a33977e955474ed290b7f579742648903f215ae)

datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador