Unable to insert special character "Staves" or "Time Signature - numbers"

Describe the bug
There are couple of issues, when inserting Special Character - Staves - any of staves symbols, or Time Signature symbols - numbers.
If only character is "Staves" symbol, nothing appears. If text already contains other content (text, or other special character), it is possible, to insert "Staves" symbol, but it doesnt take space (EDIT zero width is intended, see comment below).
If other characters are removed, Staves symbol disappears.

To Reproduce
Steps to reproduce the behavior:

1. Add Text - Special Characters - Musical Symbols - Staves (or Time Signature)
2. Click on any Staves symbol (or number in Time Signture)
3. Nothing appears in score

Expected behavior
Staves symbols behave as any other symbol, or character.

Screenshots

https://user-images.githubusercontent.com/1646034/211140003-dab26993-f7d6-468e-87cd-a3f5eb5047d7.mp4

Platform information

• OS: [reported on Linux, Win]

Additional context
Probably, problematic are those symbols, which have zero width.

No source file or test is named. Reproduce the problem in MuseScore by inserting Staves and Time Signature number symbols into an otherwise empty score and into text containing other characters, then trace special-character insertion and rendering for these zero-width symbols. Done means the symbols remain visible and behave consistently in both cases.