Short answer is it depends. The Contractor is obliged to provide the works in accordance with the Scope/Works Info and the PM may instruct changes to the Scope/Works Info. Once a change is instructed and therefore incorporated into the Scope the Contractor is obliged to follow it. If the PM issues a new drawings or adding them to the Scope, this would be an instruct, but just sharing or issuing information would not necessarily constitute an instruction. For example reissuing the same drawings listed in the Scope or issuing drawings for an adjoining section of works being completed by another Contractor is likely to just be sharing information with no obligation to do anything.
If the drawing clearly relates to the works in the Scope, is issued by the PM and change the Scope, it might be reasonable implied, but I’d suggest you check by either picking up the phone and checking with the PM and if he agrees raising a CE for the change to the Scope or raise a EWN and flag that the PM’s failure to give a clear instruction to change the Scope could delay the works. Again this scenario would be less clear cut with a third party designer, issuing drawings with say the PM cc in. I have seen plenty of example of verbal instructions being following by Contractor and then later disputed as a CE by the PM, so better to be safe than sorry and only do works instructed by the PM or already in the Scope.