Swiper 9.0.2 + React 18.2.0 in StrictMode - Cannot read properties of undefined (reading 'slideClass')

[ScorpAL]

Swiper 9.0.2 + React 18.2.0 in StrictMode

Uncaught TypeError: Cannot read properties of undefined (reading 'slideClass')
    at slideSelector (process-lazy-preloader.js:2:1)
    at processLazyPreloader (process-lazy-preloader.js:3:1)
    at HTMLImageElement.<anonymous> (core.js:484:1)

Originally posted by @ScorpAL in #5398 (comment)

[nolimits4web]

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