Braze
Three silent send failures on Braze.
Braze Canvases are flexible, and the flexibility creates a long tail of silent failure modes. Three silent stops the community reports most often on Braze.
Braze Canvases are flexible, and the flexibility creates a long tail of silent failure modes. Three silent stops the community reports most often on Braze.
Braze
A silent send failure follows the same six steps on every ESP. The platform handles the first two well. The next four are where the lag lives, and where the wallet card flips the timeline.
Braze
A Canvas has a holdout group set to a small percentage. A filter or audience-segment change widens the holdout above its intended size, so a meaningful slice of the audience is enrolled into the control rather than the treatment. The treatment send numbers drop without a Canvas-level error.
Braze reports the Canvas as running normally. The holdout is a design choice, not a fault, so there is no alarm. The drop only shows up when revenue attribution comes in below plan a few weeks later.
The Same-day recovery window closed without a matching email.
Seed addresses outside the holdout segment receive a working Canvas. If the seed stops landing while the Canvas still reports as Live and Enrolled, the holdout has expanded.
Braze
A subject line or block uses a Liquid expression that references a custom attribute that has been renamed or dropped upstream. Braze evaluates the Liquid per recipient at send time, so the expression errors for the slice of the audience whose attribute is missing and those recipients silently do not receive the message.
Per-recipient Liquid failures are logged in the message activity log, one error per affected user, with no Canvas-level rollup. The Canvas continues to report Live and the slice of the audience whose attributes are populated still receives the send, so the dashboard reads normal while a meaningful cohort is dropped.
A seed address with the attribute populated lands the message. A seed without it does not. Diverging seed outcomes across attribute states catch templating drift before it affects the live audience.
Braze
A multivariate test variant has a custom audience filter. An upstream property change makes the filter match nobody. The variant reports zero sends. The other variants absorb the audience and the test reports as running.
Braze accepts zero-audience variants as a design choice. There is no warning that one arm is silently inactive. The test reads as healthy at the aggregate level.
A seed address that matches the variant filter validates the variant. If the seed lands one variant only, the others are silently dead.
Braze
Run this against your own programme. If you finish with three or more unticked, the case for instrumenting one flow this week is the rest of this document.
The Detection Guarantee covers your first 90 days on Starter. If we miss a silent send failure on a monitored flow inside that window, we credit up to three months of the affected tier. One page of terms, plain English, no carve-outs.