SUMMARY
Highlighting does recognize well-known bash syntax since update

STEPS TO REPRODUCE
1. create new file
2. switch highlighting to "bash"
3. type code like: { true && echo ok; }

OBSERVED RESULT
Closing bracket unrecognized

EXPECTED RESULT
Closing bracket after semi-colon recognized as valid syntax

SOFTWARE/OS VERSIONS 
KDE Plasma Version: 5.20.4-2
KDE Frameworks Version: 5.77.0-1
Qt Version: 5.15.2-1