Loop sees Expired Sensor, even after G7 sensor was replaced

[aclowkey]

Describe the bug
Yesterday evening I replaced my G7 sensor in the last hour of the grace period. It warmed up and I received samples in the app. But Loop didn't receive them.

I didn't hear the high alerts or red loop alerts all night, and woke up with very high glucose.
I noticed Loop was red and it still said "Sensor Expired". Although the sensor was receiving samples.

I tried restarting the app and it didn't do anything, I had to delete the CGM and reattach it in the Loop app.

Attach an Issue Report
Loop Report 2026-04-18 11_33_55+03_00.md

To Reproduce
TBD. I think it happened to me once before, I'll pay closer attention when replacing sensor.

Expected behavior
New sensor should be detected.

Phone

• name: iPhone
• systemName: iOS
• systemVersion: 26.1
• model: iPhone
• modelIdentifier: iPhone14,5
• batteryLevel: 0.75
• batteryState: unplugged

Loop Version

• Version Number: 3.12.1(35)
• Repo: aclowkey/LoopWorkspace

CGM

• Device: Dexcom G7
• Manager app: Dexcom App

Pump

• Manufacturer: OmniPod
• Model: Dash
• Firmware version: [e.g. 2.3A 1.1 0B 0B]

Additional context

[blameitonben]

This was once an issue in early G7 shift, we haven't had this issue in a long time. From settings, G7, then scroll down there is a manual scan for a new sensor button. This is how you manually have loop look for a new G7 sensor. This was added in the early G7 days to help with this problem. Ben

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________________________________ From: Alex Chaplianka ***@***.***> Sent: Saturday, April 18, 2026 11:13:12 AM To: LoopKit/Loop ***@***.***> Cc: Subscribed ***@***.***> Subject: [LoopKit/Loop] Loop sees Expired Sensor, even after G7 sensor was replaced (Issue #2419) [https://avatars.githubusercontent.com/u/2061017?s=20&v=4]aclowkey created an issue (LoopKit/Loop#2419)<#2419> Describe the bug Yesterday evening I replaced my G7 sensor in the last hour of the grace period. It warmed up and I received samples in the app. But Loop didn't receive them. I didn't hear the high alerts or red loop alerts all night, and woke up with very high glucose. I noticed Loop was red and it still said "Sensor Expired". Although the sensor was receiving samples. I tried restarting the app and it didn't do anything, I had to delete the CGM and reattach it in the Loop app. Attach an Issue Report Loop Report 2026-04-18 11_33_55+03_00.md<https://github.com/user-attachments/files/26852346/Loop.Report.2026-04-18.11_33_55%2B03_00.md> To Reproduce TBD. I think it happened to me once before, I'll pay closer attention when replacing sensor. Expected behavior New sensor should be detected. Phone * name: iPhone * systemName: iOS * systemVersion: 26.1 * model: iPhone * modelIdentifier: iPhone14,5 * batteryLevel: 0.75 * batteryState: unplugged Loop Version * Version Number: 3.12.1(35) * Repo: aclowkey/LoopWorkspace CGM * Device: Dexcom G7 * Manager app: Dexcom App Pump * Manufacturer: OmniPod * Model: Dash * Firmware version: [e.g. 2.3A 1.1 0B 0B] Additional context — Reply to this email directly, view it on GitHub<#2419?email_source=notifications&email_token=ACWNLOYIKLPPOJM4O4JA3LD4WNBKRA5CNFSL4Z3JMQ5C6L3HNF2C22DVMIXUS43TOVSS6NBSHA3TINBSG43DJJTSMVQXG33OVJZXKYTTMNZGSYTFMSSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ACWNLOYOS7VWTDI2GHDIJ734WNBKRAVCNFSM6AAAAACX5ZLXJ2VHI2DSMVQWIX3LMV43ASLTON2WKOZUGI4DONBUGI3TMNA>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>