Release r4.1 review findings

[eric-murray]

Placeholder for issues arising from the review of release r4.1 snapshots #231 / #237

[tanjadegroot]

Hi @bigludo7, @chinaunicomyangfan @FabrizioMoggio, any chnce you will be progressing on these findings and on the release of the M3 rc.1 ? many thanks !