RTL script keyboards Keyman 14.0.282 Mac OS Big Sur not properly functioning

Tried different keyboards for RTL scripts like Arabic etc. but the curser alway jumps, after typing a word, from the left of the word, to the end of the line on the right side of the line.
Space sometimes also does not work. Looks like in Mac OS a language configuration option is not possible like in Windows
Any ideas what to do?
Using Mac OS Big Sur 11.6.1
MS Word for Mac 16.49…
Keyman 14.0.282

Greetings,
DP

The issue described here is similar to this bug(mac): When using Farsiman keyboard, the cursor stays on the far right of the text at times even though it's for RTL language · Issue #5855 · keymanapp/keyman · GitHub.