Address issues related to the Web Connectivity 0.5 rollout

Web Connectivity 0.5 was rolled out on August 18th 2026 to all probes.

We started looking at the measurement data comparing the agreements of the fastpath analysis (i.e. the probe analysis) with that of the new pipeline (analysis_web_meausurement table), to identify differences.

To do this we divided measurements into 4 stratums:

• S00 -> both analysis agree with it not being blocked
• S01 -> fastpath says unblocked, analysis says blocked
• S11 -> both say blocked
• S10 -> fastpath says blocked, analysis says unblocked

As a baseline for comparison we drew a couple of windows of measurements from July, before web_connectivity was deployed.

{"start_time": "2026-07-03", "end_time": "2026-07-08"}

{"start_time": "2026-06-03", "end_time": "2026-06-08"}

As we can see the distributions are quite similar across the stratums.

We then examined for when web_connectivity was first deployed:
{"start_time": "2026-08-19", "end_time": "2026-08-20"}

As we can see the distribution is very skewed towards S01, which suggests the analysis_web_measurement believes measurements to be much more blocked than the probe.