Reversing order of stylesheet reference fixes the misaligned icon; I also removed slds-input--small as it's deprecated in SLDS 2.0 and it was messing with our custom lookupInput style.
Reversing order of stylesheet reference fixes the misaligned icon; I also removed slds-input--small as it's deprecated in SLDS 2.0 and it was messing with our custom lookupInput style.

Zosoled/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,cdcarter/Cumulus,Zosoled/Cumulus,Zosoled/Cumulus,cdcarter/Cumulus,SalesforceFoundation/Cumulus,cdcarter/Cumulus,Zosoled/Cumulus,cdcarter/Cumulus,SalesforceFoundation/Cumulus