Doing some testing today (rather new with an iPad*) I see no issues in creating, saving and then again editing.
Might there be an issue depending on the location where one tries to save?
- my iPad (6th ge., iOs 17.3.1)
COOLWSD 23.05.7.4 git hash c36099e3
LOKit 23.05.7.4 git hash d338aee