Joomla 5.4.9
J2Commerce 4.1.10
Trashing a product caused both shop pages on my website to crash - when published or unpublished, there was no issue. Crash only applied to J2Commerce v4 » Products List View menu types as far as I could tell - may apply to others but none were present to check - Joomla Category Blog pages were unaffected.
I was able to resolve this by selecting No for Treat as a Product then traashing.
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On my site I was only making a test article (now fully deleted) and was able to fix this, but it could cause outages on other people's websites.
Is this a known bug and will this be upgraded for the pre-Joomla-6 version of the software? i can provide credentials if this would be useful.