Arabic: wrong character order
As of InDesign version 19.2, numbers together with certain characters display incorrectly. Before version 19.2, in case you have e.g. 30% (in English), this should display as %30 in Arabic. As of 19.2, I have to add a right-to-left marker to have the right output; otherwise it will be displayed as 30%. Consequence is that in case linguists don't add the marker, all numbers or sequences display incorrectly.
This is very error prone.