Link dialog sometimes fails to display parameters

Have XWiki Jetty/HSQLDB 18.9.0 with the experimental BlockNote editor installed. Configure BlockNote as the default editor.

Steps to reproduce

I don't have exact steps for this issue, only below obervation

1. Ensure that page has link created from Blocknote editor
2. Try to edit such page again realtime session Blocknote editor
3. Try to create another link from slash command /link

Actual result

The link dialog occasionally opens without displaying the main parameters such as display text, link type and page reference. link dialog without main parameters.png Only optional parameters and buttons are available.

Expected result

The link dialog displays all the parameters.

Note

A hard refresh helps only once. After the page may be modified,  if refresh has already taken place. The main parameters might again be missing from the link in the dialog box during the next editing session.