I've now received two bug reports from Samsung users related to auto-correct here and here.
Not sure what to do next. This stupid Samsung keyboard is driving me crazy...
Btw, I also tested other journal apps like Day One - I believe they implemented the same workaround for the Samsung keyboard issue and auto-correct also isn't working in the Day One app as a result (e.g. apostrophes aren't automatically inserted in words like "don't" or the word "I" isn't auto-capitalized).
Unfortunately, contrary to the article I posted above, the Grammarly feature still hasn't been removed from the Samsung keyboard, at least on my device.
Edit: With the next version I will do some small change to the workaround, which should re-enable autocorrect. But in my testing, the list & formatting issues caused by Grammarly appeared again occasionally (however less frequently than without the workaround). Curious to hear some feedback from Samsung keyboard users if the experience is somewhat ok then