sticky space after replace word? (Libre office writer)

This is not happen when I use 6.2.1, but after I update to 6.2.2.

When I want to change a word by select it and type the replacement, if the replacement have 2 or more word, they became stick together (my space doesnt work, instead, it continue to space to the right)

For example:
“This sentence [is] example”

I want to replace the “is”, then I select it and type the replacement, it became like this

“This sentence [isnotexample] example”

The replace word got stick together. Meanwhile if I press space, it countinue to space to the right, not the word I want

“This sentence [isnotexample] ________ example”

This is the first time I try Libre, so I dont know this is a feature or a bug, please help because it’s uncomforatble