Sorry, I missed this in your posting. Yes, I can confirm (tested on 18th Dec 2017 with firmware 1.1.0.3) that with my device it works for layer A and for both layers in stack mode. Layer B only or layer B when using split mode does collect any keypress and does not release the previous ones.
Tried it again, still works like described. Try following with two basic programs A and B:
Layer A
- Set CLOCK DIVIDE to Quarter
- Switch on ARP, set Arp Relatch to On
Layer B
- Set CLOCK DIVIDE to 16th
- Switch on ARP, set Arp Relatch to On
- Set OSC 1 FREQ to C4
Just use Layer A, press one key -> you will hear this tone. Press two other keys -> you will hear these two instead of the previous one.
Then switch on Stack A+B and HOLD. Press one key -> you will hear a low tone and a faster high tone. Press two other keys -> you will hear two low tones and two faster higher tones.
Can you reproduce this?