Corruption when deleting and selecting beats with two instruments

OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 3.0.0.4747, revision: 96c1f7b

Steps:
1) Score for two instruments eg flute/cello
2) Select whole rest first staff -> type 6 (to get two half rests)
3) Ctlr + Del
4) Select the remaining half rest -> type 5 (to receive two quarter rests)
First result:
First corruption: a quarter rest jumps to the next (first) measure
5) Undo:
Result: worse corruption, empty measure (0/1 message when saving and reloading the score)

See: