Pronunciation of present participle of words ending on “-‘le” - for native speakers of English
When a word that ends on -le, “wobble” for instance, has -ing added to it and becomes “wobbling” then I pronounce it as two syllables, /ˈwɒb.lɪŋ/. But I have noticed when listening to audiobooks read by Americans that such words are often pronounced with (what to me sounds like) three syllables, /ˈwɑː.bəl.ɪŋ/, as if the word was spelled “wobbleing”.
I can’t remember exactly which words it happens to, so perhaps not “wobble”, but I know it’s words that end on -le like:
double, tickle, shuffle, stumble, rustle etc.
I have two questions (it’s all right if you can’t answer both of them):
Is this a common trait of North American English?
Is it something that also happens in other variants of English?
Thanks a lot for your help!