Performance issues intermittently show unrelated spans in the Span Evidence trace waterfall snapshot. In the reported example, a Flask N+1 query issue displays Rails spans instead of the Flask database spans described by the evidence.
- Example event in project
BACKEND-FLASK-CE.
- Issue query:
SELECT * FROM reviews, product_bundles WHERE productId = %s. The evidence lists parent span function - src.db.get_products and preceding query SELECT * FROM products WHERE id IN ( SELECT id FROM products, pg_sleep(%s) ).
- Previously observed and reported; reported again on September 15–16, 2026 as happening more frequently, including during demos.
- Intermittent behavior reported by the user; not independently reproduced. Root cause and affected scope are unknown.
Recreated from https://github.com/getsentry/sentry-options-automator/issues/9765, which was filed in the wrong repository.
via neil.
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View Junior Session [Sentry]
Performance issues intermittently show unrelated spans in the Span Evidence trace waterfall snapshot. In the reported example, a Flask N+1 query issue displays Rails spans instead of the Flask database spans described by the evidence.
BACKEND-FLASK-CE.SELECT * FROM reviews, product_bundles WHERE productId = %s. The evidence lists parent spanfunction - src.db.get_productsand preceding querySELECT * FROM products WHERE id IN ( SELECT id FROM products, pg_sleep(%s) ).Recreated from https://github.com/getsentry/sentry-options-automator/issues/9765, which was filed in the wrong repository.
via neil.
--
View Junior Session [Sentry]