Edit pdf text format instability

Hello Guys,

We can all agree that editing existing text in Acrobat can easily go wrong and mess up the text block format even if the font is embedded in the pdf and installed on our machine.

But in Adobe Acrobat documentation they don't mention anything about this instability, they just say you need to have the font installed.

I'm looking for a formal brief explanation from Adobe or a piece of advice about editing text in Acrobat that it is not recommended unless it's really necessary and users should expect a break in text format or unexpected shifting in lines or so on, also to mention that Acrobat is not a text editing software.

I want to include these recommendations inside a training document I'm working on for my students about editing pdf cuz they keep asking about problems in editing pdf and mostly they use Arabic fonts which breaks way more often and causes more trouble.

Any help is greatly appreciated

Thanks

Ahmad