The capatilise letters thing is happening with my phone too after the last keyboard update and I usually have to press back space and the letter changes to a capital.
It's a bug.
I do not get the arrows situation however.
I'm not sure if you could get a screenshot to show what's happening.
Do look in the keyboards settings please.
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Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
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