# Parsing abruptly stops while developing a preset

**URL:** <https://forum.electra.one/t/parsing-abruptly-stops-while-developing-a-preset/4074>\
**Category:** Bug reports\
**Created:** [December 17, 2025, 9:17pm UTC](https://forum.electra.one/t/parsing-abruptly-stops-while-developing-a-preset/4074 "2025-12-17T21:17:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![NewIgnis](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.electra.one/newignis/32/767_2.png) [@NewIgnis](https://forum.electra.one/u/NewIgnis)\
**Post date:** [December 17, 2025, 9:17pm UTC](https://forum.electra.one/t/parsing-abruptly-stops-while-developing-a-preset/4074/1 "2025-12-17T21:17:34Z")

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For the thrid time in a row, I have this experience where a preset, which includes parsing, suddenly stops parsing while further developing the preset in other areas (like changing colors, hiding or moving controls) .  
Are there means to debug this cause?  
I can recover to go back to a previous version.

What I observe after the parsing stops working :

When listening to the sysex via the webeditor, the sysex response is nicely coming through and the correct vales seem to be assigned to the appropiate parameter.

In regular (non-listening) mode:

- the function midi.onSysex is still being called by incoming sysEx
- the function parameterMap.onChange is still being called by manual parameter changes and lua changes (origin 0 and 2)
- the function parameterMap.onChange is no longer being called by parsed parameter changes