Schmalle

It has to be programed per preset (aka patch). There is no global mode that does what you specified.

Set Global Settings > Footswitches > Stomp Mode to 6 Switch. Use Stomp Mode. Program the three footswitches by assigning each with a Snapshot Command (1, 2, 3) using Command Center. This has to be done per patch.

"Center" is 0%. Tip: Save the block as favorite for easy access and name it "FlipFlopper" or something even funnier. ;) Have fun.

To invert the phase set up a Stereo Width block [Volume/Pan (Stereo)] like this: Width Center, LR Swap Off, Balance R100, Level 0.0dB, RPolarity Invert ...and use a (any) mono block after it. Why do I need a mono block after it you ask? With the above mentioned setting the inverted signal leaves the block on the right channel only (left muted). A mono block after it automatically sums L (no signal) and R (flipped phase signal).

A suggestion would be to use a MIDI monitoring program to track all MIDI messages. Maybe that reveals something suspicious.

A total noob with a cave of forgotten gear? Find the error.

If you haven't been successful yet: start with using Helix in the loop. guitar -> VH4 input VH4 send -> Helix in Helix out -> VH4 parallel return Engage Send 2 button on the front panel and set the "Volume Parallel Loop" knob to noon. In Helix create an empty patch, select a reverb block and set it's Mix parameter to 100%. Crank Helix's VOLUME knob. You should now hear your VH4 sound with reverb and you should be able to dial in the amount with Vh4's "Volume Parallel Loop" knob.

You can contact support. I asked for the specifics of a different part which they provided.

Of those four links listed Electronic Music Services looks the best to me. The two guys doing repairs of music electronics for a long time and have great reputation according to their reviews on Google.

New Features & Improvements (3.83) New Dynamics Models: Dynamics > Stereo Width - Control the stereo field width of your signal Dynamics > Stereo Imager - Advanced stereo imaging control Dynamics > Gain - Simple, transparent gain staging Dynamics > Volume Pedal - Emulation of a classic volume pedal Dynamics > Pan - Stereo panning control MIDI Enhancements: Improved MIDI Clock Performance: Significantly enhanced MIDI clock stability and accuracy with a redesigned MIDI clock engine. Users should experience more precise tempo synchronization with external MIDI devices. MIDI Clock Auto Mode: Refined behavior when MIDI Clock RX is set to Auto, improving how the device handles loss of MIDI clock signal. Preset Change MIDI Handling: Improved how MIDI CC events are processed during preset changes, reducing potential conflicts. Tempo & Timing Improvements: Major Tempo Handling Update: Comprehensive improvements to tempo source management and switching, providing more reliable behavior when changing between internal and external tempo sources. Display Updates: Enhanced tempo source selection display to correctly reflect the current state. Bug Fixes (3.83) Fixed an issue where parameter changes could be incorrectly blocked in certain scenarios. Resolved tempo synchronization issues when switching between tempo sources. Corrected MIDI clock loss detection in specific edge cases. Compatible OS: Windows 10, Windows 11, Mac OS X, macOS Big Sur, macOS Monterey, macOS Sonoma, macOS Tahoe, macOS Ventura

It sounds like you're having a very frustrating experience! Here is a rewritten version of your issue that is clearer and easier for others to understand: Line 6 Helix Floor Connection Issues with HX Edit I'm having persistent connection issues with my Line 6 Helix Floor and the HX Edit software on both Mac and Windows operating systems. The main problem is that the Helix will not reliably connect to HX Edit via USB. I've tried multiple USB cables, including another known-good cable, but the issue persists. When a connection is established, it is unstable. It typically stays connected for only a few minutes before disconnecting. This connecting/disconnecting cycle repeats several times. Glitching and Freezing: While it is briefly connected, the Helix Floor unit itself (and likely the HX Edit display) will start glitching and freezing. I'm unable to resolve this and I've already tried to open a support ticket with Line 6, but the system is not allowing me to submit it. Is that a fair rewrite? Concerning the support ticket problem, how did you realize that the system doesn't allow to submit it? Could you tell what specific Mac and Windows operating systems you are using (e.g., macOS Sonoma, Windows 11) and what troubleshooting steps you've already taken (besides changing the cable)? This information might help in suggesting a solution.

Does this occur without connecting to your Mac?

Make sure to set Global Settings > Preferences > EXP 2/EXT AMP to EXT AMP.

Not enough information. Listen to that track and / or take a look at the Helix patch that was used.