Some questions about Braille Screen Input on iOS 13

HI again,
when I type with Braille virtual Keyboard on my Iphone after the update, I notece that sometimes it makes a sound, someone knows what it is mean?, and I notice too, what in Email, dalate doesn't work very well, I would like to know if it happens only to me or to the others too, with 13.1 anything changed.

Forum: 

#1 Having problems of my own

I'm also having issues with BSI, it seems it's forgetting dot positions a lot more often, and I keep having to use exploring mode to get it back in place.

#2 It's borken

Hey, yeah, I too am having problems. If I type something switch back to standard mode to send something, say in messages, and then flip back to BSI it often gets confused or switches from contracted brail to six dot brail. Sometimes it doesn't work at all. A shame as I believe one of the touted improvements was BSI being faster and more responsive.

#3 Bsi problems.

I seem to run into problems with it in emails. If I'm typing a word in there followed by a space, then try deleting that word with a 2 finger flick to the left, it behaves strangely. It appears to do it, but it doesn't inform correctly.

#4 Email delay

Is it a delay between the gesture and the action? Also I'm getting it saying the previous two words which is confusing as I think it only deletes the first one. Very annoying as it worked perfectly in 12.4