"V" shortcut does not affect the ties and slurs which extend on the following system
See attached file. Instructions also in file.
Select the lone (system-spanning) tie. Use "select all similar elements" then press "V" to make invisible. All the ties disappear except the tie you clicked on!
Now undo invisibility and untick the "visible" option in the Inspector instead. This time ALL the ties become invisible!
When I tried to close the file after this operation the program crashed (may not be reproducible). Issue discussed at //musescore.org/en/node/66761 .