Tied notes loose tie when copy pasted

I have a piece (Moondance, Van Morrison) that I am transcribing. There a lot of repeated parts with lots of tied notes, not only within a measure, but also across bars.
So, to save time I copy paste a lot. This is wat happens:
1) Copy complete measures, two linked piano systems
2) Move view to new empt bar
3) select top piano system
4) press ctrl+V to paste
Results:
A) Optical it looks good
B) playback is all wrong (playback is an issue anyway!): the tied notes are not played as tied notes
C) Close file
D) re-open file
E) lookup the new pasted section
F) See all the tie-lines are gone

:(

Playback on my system is also a nightmare. Parts are skipped without any reason, and often the tempo indications are completely ignored or kick in after 40 measures..

Using the continuous view (using dutch version, so assuming translation here)...

Using an AppImage, installed using
./MuseScore-3.0.2-x86_64.AppImage install

after chmod a+x

OS: Ubuntu 18.04.1 LTS, Arch.: x86_64, MuseScore version (64-bit): 3.0.2., revision: 8ca4d2c

Using ALSA Audio (just default settings) and a Yamaha P105b digital piano connected through an USB-port.