silverhead

There was a hardware fault in the very early Pod GO units off the manufacturing line. It affected resistance in the input circuitry. It was resolved fairy quickly but it's possible that your older Pod Go unit has this fault and the later one does not. That could explain the difference. To be sure open a support ticket. If your old model is flawed Line 6 will repair it for free. Having said that, the repair would make the older unit sound like the newer one, which is not what you want. Get advice from Line 6 while your support ticket is open. And, of course, the issue could be something else. But start with this possibility.

Correct. No modeling changes. And there won’t likely be any further updates so you should be fine without the interface.

JTV Firmware versions beyond v2.1 apply to the Standard and Shuriken models and will have no impact on the 59.

Assign the Wah Bypass to a footswitch, not the heel down position.

The Stadium manual can be found under the Support link at the top of this page. Choose Manuals and then filter for Helix Stadium. It is a rich format web based manual, not a downloadable pdf.

Your Helix device should act as an interface for update purposes. Sounds like your equipment is OK. I would open a support ticket.

The HD Metal Pack is no longer being sold directly from the Line 6 website. However I expect there are at least two possible ways you can get it: 1) Open a support ticket and see if Line 6 can sell you a license for the pack on an ad-hoc basis; or 2) Someone reading this post might respond with a license they would be willing to transfer. Note that the pack already exists inn the HD500x device firmware; the license simply provides a key to unlock it.

https://www.httrack.com/ I haven’t tried it but maybe worth a look?

Note that Line 6 Monkey has been retired as explained in one of the banners at the top of this page. Perhaps an alternative described there will work.

Sounds like there are 2 mixers involved: the virtual Matrix Mixer in the Stadium device and an external physical mixer. Have you checked all settings on both, particularly the expanded Song view in the Matrix Mixer?

The best, and only, way to officially report a bug is to open a support ticket. There is no way to review existing bug reports. This is actually a good thing because if there were a way to view them it might result in people experiencing a bug and not reporting it because it’s already been reported. It’s important for Line 6 to know how many people a specific bug is affecting. That helps prioritize the sequencing of bug fixes. Short story: if you think you have found a bug open a support ticket.

I’m not sure. Open a support ticket.

Interesting. I suggest you open a support ticket to report a possible bug.

Good plan. If that doesn’t work the next step would be to reinstall the firmware using Line 6 Central.

Are you familiar with the Trails On/Off parameter? That controls whether the delayed notes keep sounding when the Delay block is turned off. Perhaps it needs to be set to On?