I enable Spell-Check in Editor on Ipad. Typing markdown to create line but won’t show up Preview pane

Hi all, I am new to Obsidian.
I get the same problem and take some time to find this post.
Problem is not solved yet. And I would like to seek for solution too.

When we’re using iPad and Obsidian setting - SpellCheck is switch on.
We will find that when we type in 2 Minus “-“, it will change 2 Minus “–“ to a dash “—“ automatically.

In order to type the 3 Minus, I need to type “- - -“ and then remove the space character.

It is really annoying.
Hope it could be fit.