LONDON—Euro zone manufacturing growth remained strong in September but activity took a big hit from supply chain bottlenecks that are likely to persist and keep inflationary pressures high, a survey showed on Friday. Factories have struggled with logistical issues, product shortages and a labour crunch brought about in large part by ongoing disruptions caused by the coronavirus pandemic which forced governments to impose strict restrictions on mobility. IHS Markit’s final manufacturing Purchasing Managers’ Index (PMI) sank to 58.6 in September from August’s 61.4, and just below an initial 58.7 “flash” estimate. An index measuring output, which feeds into a composite PMI due on Tuesday and is seen as a good guide to economic health, dropped from August’s 59.0 to 55.6. Anything above 50 indicates growth. “While euro zone manufacturing expanded at a robust pace in September, growth has weakened markedly as producers report a growing toll from supply chain headwinds,” …