Is this the same issue? Take Observation 2434434 mentioned in Observation 2412799: METEOR-M 2 (40069). There’s a distinct shift at about 700 seconds where the central line shifts left substantially. You can also see a fair bit of regular back and forth around the 200 second mark. Whereas with these observations they exhibit the zebra lines but the signal stays central. Are the ‘zebra lines’ part of the same issue, an artefact of it, or an independent problem?